Optimize imports for the entire codebase

nucypher/blockchain/economics.py

@@ -20,7 +20,7 @@ from decimal import Decimal, localcontext
 from math import log
 from typing import Tuple
 
-from nucypher.blockchain.eth.agents import ContractAgency, NucypherTokenAgent, StakingEscrowAgent, AdjudicatorAgent, \
+from nucypher.blockchain.eth.agents import AdjudicatorAgent, ContractAgency, NucypherTokenAgent, StakingEscrowAgent, \
     WorkLockAgent
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.blockchain.eth.token import NU

nucypher/blockchain/eth/actors.py

@@ -15,63 +15,63 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import csv
 import json
+import traceback
+
+import click
+import csv
+import maya
 import os
 import sys
 import time
-import traceback
+from constant_sorrow.constants import FULL, NO_WORKER_BONDED, WORKER_NOT_RUNNING
 from decimal import Decimal
-from typing import Tuple, List, Dict, Optional
-
-import click
-import maya
 from eth_tester.exceptions import TransactionFailed as TestTransactionFailed
-from eth_utils import is_checksum_address, to_checksum_address, to_canonical_address
+from eth_utils import to_canonical_address, to_checksum_address
 from twisted.logger import Logger
+from typing import Dict, List, Optional, Tuple
 from web3 import Web3
 from web3.exceptions import ValidationError
 
-from constant_sorrow.constants import (
-    WORKER_NOT_RUNNING,
-    NO_WORKER_BONDED,
-    FULL
-)
-from nucypher.blockchain.economics import StandardTokenEconomics, EconomicsFactory, BaseEconomics
+from nucypher.blockchain.economics import BaseEconomics, EconomicsFactory, StandardTokenEconomics
 from nucypher.blockchain.eth.agents import (
-    NucypherTokenAgent,
-    StakingEscrowAgent,
-    PolicyManagerAgent,
     AdjudicatorAgent,
     ContractAgency,
-    PreallocationEscrowAgent,
     MultiSigAgent,
+    NucypherTokenAgent,
+    PolicyManagerAgent,
+    PreallocationEscrowAgent,
+    StakingEscrowAgent,
     WorkLockAgent
 )
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.decorators import only_me, save_receipt, validate_checksum_address
 from nucypher.blockchain.eth.deployers import (
-    NucypherTokenDeployer,
-    StakingEscrowDeployer,
-    PolicyManagerDeployer,
-    StakingInterfaceDeployer,
     AdjudicatorDeployer,
     BaseContractDeployer,
-    WorklockDeployer,
     MultiSigDeployer,
-    StakingInterfaceRouterDeployer
+    NucypherTokenDeployer,
+    PolicyManagerDeployer,
+    StakingEscrowDeployer,
+    StakingInterfaceDeployer,
+    StakingInterfaceRouterDeployer,
+    WorklockDeployer
 )
 from nucypher.blockchain.eth.interfaces import BlockchainDeployerInterface, BlockchainInterfaceFactory
 from nucypher.blockchain.eth.multisig import Authorization, Proposal
 from nucypher.blockchain.eth.registry import BaseContractRegistry, IndividualAllocationRegistry
-from nucypher.blockchain.eth.signers import Web3Signer, Signer, KeystoreSigner
+from nucypher.blockchain.eth.signers import KeystoreSigner, Signer, Web3Signer
 from nucypher.blockchain.eth.token import NU, Stake, StakeList, WorkTracker
-from nucypher.blockchain.eth.utils import datetime_to_period, calculate_period_duration, datetime_at_period, \
+from nucypher.blockchain.eth.utils import (
+    calculate_period_duration,
+    datetime_at_period,
+    datetime_to_period,
     prettify_eth_amount
+)
 from nucypher.characters.banners import STAKEHOLDER_BANNER
 from nucypher.characters.control.emitters import StdoutEmitter
-from nucypher.cli.painting.transactions import paint_receipt_summary
 from nucypher.cli.painting.deployment import paint_contract_deployment, paint_input_allocation_file
+from nucypher.cli.painting.transactions import paint_receipt_summary
 from nucypher.config.constants import DEFAULT_CONFIG_ROOT
 from nucypher.crypto.powers import TransactingPower
 from nucypher.network.nicknames import nickname_from_seed

nucypher/blockchain/eth/agents.py

@@ -17,27 +17,19 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 import importlib
 import random
-from typing import Generator, List, Tuple, Union, Dict, Optional
 
 import math
 from constant_sorrow.constants import NO_CONTRACT_AVAILABLE
 from eth_utils.address import to_checksum_address
 from twisted.logger import Logger
+from typing import Dict, Generator, List, Tuple, Union
 from web3.contract import Contract
 
-from nucypher.blockchain.eth.constants import (
-    DISPATCHER_CONTRACT_NAME,
-    STAKING_ESCROW_CONTRACT_NAME,
-    POLICY_MANAGER_CONTRACT_NAME,
-    PREALLOCATION_ESCROW_CONTRACT_NAME,
-    STAKING_INTERFACE_CONTRACT_NAME,
-    STAKING_INTERFACE_ROUTER_CONTRACT_NAME,
-    ADJUDICATOR_CONTRACT_NAME,
-    NUCYPHER_TOKEN_CONTRACT_NAME,
-    MULTISIG_CONTRACT_NAME,
-    ETH_ADDRESS_BYTE_LENGTH,
-    NULL_ADDRESS
-)
+from nucypher.blockchain.eth.constants import (ADJUDICATOR_CONTRACT_NAME, DISPATCHER_CONTRACT_NAME,
+                                               ETH_ADDRESS_BYTE_LENGTH, MULTISIG_CONTRACT_NAME,
+                                               NUCYPHER_TOKEN_CONTRACT_NAME, NULL_ADDRESS, POLICY_MANAGER_CONTRACT_NAME,
+                                               PREALLOCATION_ESCROW_CONTRACT_NAME, STAKING_ESCROW_CONTRACT_NAME,
+                                               STAKING_INTERFACE_CONTRACT_NAME, STAKING_INTERFACE_ROUTER_CONTRACT_NAME)
 from nucypher.blockchain.eth.decorators import validate_checksum_address
 from nucypher.blockchain.eth.events import ContractEvents
 from nucypher.blockchain.eth.interfaces import BlockchainInterfaceFactory

nucypher/blockchain/eth/clients.py

@@ -16,20 +16,18 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import json
-import os
-import shutil
-from typing import Union
 
 import maya
+import os
+import shutil
 import time
 from constant_sorrow.constants import NOT_RUNNING, UNKNOWN_DEVELOPMENT_CHAIN_ID
 from cytoolz.dicttoolz import dissoc
 from eth_account import Account
 from eth_account.messages import encode_defunct
-from eth_utils import to_canonical_address
-from eth_utils import to_checksum_address
+from eth_utils import to_canonical_address, to_checksum_address
 from geth import LoggingMixin
-from geth.accounts import get_accounts, create_new_account
+from geth.accounts import create_new_account, get_accounts
 from geth.chain import (
     get_chain_data_dir,
     initialize_chain,
@@ -38,9 +36,9 @@ from geth.chain import (
 )
 from geth.process import BaseGethProcess
 from twisted.logger import Logger
+from typing import Union
 from web3 import Web3
 
-from nucypher.blockchain.eth.signers import ClefSigner
 from nucypher.config.constants import DEFAULT_CONFIG_ROOT, DEPLOY_DIR, USER_LOG_DIR
 
 UNKNOWN_DEVELOPMENT_CHAIN_ID.bool_value(True)

nucypher/blockchain/eth/decorators.py

@@ -1,12 +1,9 @@
+import eth_utils
 import functools
+import inspect
 from datetime import datetime
-
 from twisted.logger import Logger
 from typing import Callable
-import inspect
-import eth_utils
-
-from nucypher.crypto.api import keccak_digest
 
 __VERIFIED_ADDRESSES = set()
 

nucypher/blockchain/eth/deployers.py

@@ -17,31 +17,16 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 from collections import OrderedDict
-from typing import Tuple, Dict, List
 
-from constant_sorrow.constants import (
-    CONTRACT_NOT_DEPLOYED,
-    NO_DEPLOYER_CONFIGURED,
-    NO_BENEFICIARY,
-    BARE,
-    IDLE,
-    FULL
-)
+from constant_sorrow.constants import (BARE, CONTRACT_NOT_DEPLOYED, FULL, IDLE, NO_BENEFICIARY, NO_DEPLOYER_CONFIGURED)
+from typing import Dict, List, Tuple
 from web3 import Web3
 from web3.contract import Contract
 
-from nucypher.blockchain.economics import StandardTokenEconomics, BaseEconomics
-from nucypher.blockchain.eth.agents import (
-    EthereumContractAgent,
-    StakingEscrowAgent,
-    NucypherTokenAgent,
-    PolicyManagerAgent,
-    PreallocationEscrowAgent,
-    AdjudicatorAgent,
-    WorkLockAgent,
-    MultiSigAgent,
-    ContractAgency
-)
+from nucypher.blockchain.economics import BaseEconomics, StandardTokenEconomics
+from nucypher.blockchain.eth.agents import (AdjudicatorAgent, ContractAgency, EthereumContractAgent, MultiSigAgent,
+                                            NucypherTokenAgent, PolicyManagerAgent, PreallocationEscrowAgent,
+                                            StakingEscrowAgent, WorkLockAgent)
 from nucypher.blockchain.eth.constants import DISPATCHER_CONTRACT_NAME, NULL_ADDRESS, STAKING_ESCROW_CONTRACT_NAME
 from nucypher.blockchain.eth.decorators import validate_checksum_address
 from nucypher.blockchain.eth.interfaces import (
@@ -49,8 +34,7 @@ from nucypher.blockchain.eth.interfaces import (
     BlockchainInterfaceFactory,
     VersionedContract,
 )
-from nucypher.blockchain.eth.registry import AllocationRegistry
-from nucypher.blockchain.eth.registry import BaseContractRegistry
+from nucypher.blockchain.eth.registry import AllocationRegistry, BaseContractRegistry
 
 
 class BaseContractDeployer:

nucypher/blockchain/eth/interfaces.py

@@ -24,44 +24,29 @@ import os
 import pprint
 import requests
 import time
-from constant_sorrow.constants import (
-    NO_BLOCKCHAIN_CONNECTION,
-    NO_COMPILATION_PERFORMED,
-    UNKNOWN_TX_STATUS,
-    NO_PROVIDER_PROCESS,
-    READ_ONLY_INTERFACE,
-    INSUFFICIENT_ETH
-)
+from constant_sorrow.constants import (INSUFFICIENT_ETH, NO_BLOCKCHAIN_CONNECTION, NO_COMPILATION_PERFORMED,
+                                       NO_PROVIDER_PROCESS, READ_ONLY_INTERFACE, UNKNOWN_TX_STATUS)
 from eth_tester import EthereumTester
 from eth_tester.exceptions import TransactionFailed as TestTransactionFailed
 from eth_utils import to_checksum_address
 from twisted.logger import Logger
-from typing import List, Callable
-from typing import Tuple
-from typing import Union
+from typing import Callable, List, Tuple, Union
 from urllib.parse import urlparse
-from web3 import Web3, WebsocketProvider, HTTPProvider, IPCProvider, middleware
-from web3.contract import ContractConstructor, Contract
-from web3.contract import ContractFunction
-from web3.exceptions import TimeExhausted
-from web3.exceptions import ValidationError
+from web3 import HTTPProvider, IPCProvider, Web3, WebsocketProvider, middleware
+from web3.contract import Contract, ContractConstructor, ContractFunction
+from web3.exceptions import TimeExhausted, ValidationError
 from web3.gas_strategies import time_based
 from web3.middleware import geth_poa_middleware
 
 from nucypher.blockchain.eth.clients import EthereumClient, POA_CHAINS
 from nucypher.blockchain.eth.decorators import validate_checksum_address
-from nucypher.blockchain.eth.providers import (
-    _get_test_geth_parity_provider,
-    _get_auto_provider,
-    _get_infura_provider,
-    _get_IPC_provider,
-    _get_websocket_provider,
-    _get_HTTP_provider, _get_mock_test_provider, _get_pyevm_test_provider
-)
+from nucypher.blockchain.eth.providers import (_get_HTTP_provider, _get_IPC_provider, _get_auto_provider,
+                                               _get_infura_provider, _get_mock_test_provider, _get_pyevm_test_provider,
+                                               _get_test_geth_parity_provider, _get_websocket_provider)
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.blockchain.eth.sol.compile import SolidityCompiler
-from nucypher.blockchain.eth.utils import prettify_eth_amount, get_transaction_name
-from nucypher.characters.control.emitters import StdoutEmitter, JSONRPCStdoutEmitter
+from nucypher.blockchain.eth.utils import get_transaction_name, prettify_eth_amount
+from nucypher.characters.control.emitters import JSONRPCStdoutEmitter, StdoutEmitter
 from nucypher.utilities.logging import GlobalLoggerSettings
 
 Web3Providers = Union[IPCProvider, WebsocketProvider, HTTPProvider, EthereumTester]

nucypher/blockchain/eth/multisig.py

@@ -17,11 +17,11 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 import json
 from collections import namedtuple
-from typing import Any, Dict, Tuple
 
 from bytestring_splitter import BytestringSplitter
 from eth_abi.packed import encode_single_packed
 from eth_account import Account
+from typing import Any, Dict, Tuple
 from web3 import Web3
 from web3.contract import Contract, ContractFunction
 

nucypher/blockchain/eth/providers.py

@@ -14,15 +14,12 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-from typing import Union
-
 import os
+from eth_tester import EthereumTester, PyEVMBackend
 from eth_tester.backends.mock.main import MockBackend
+from typing import Union
 from urllib.parse import urlparse
-
-from eth_tester import EthereumTester
-from eth_tester import PyEVMBackend
-from web3 import WebsocketProvider, HTTPProvider, IPCProvider
+from web3 import HTTPProvider, IPCProvider, WebsocketProvider
 from web3.exceptions import InfuraKeyNotFound
 from web3.providers.eth_tester.main import EthereumTesterProvider
 

nucypher/blockchain/eth/registry.py

@@ -14,19 +14,19 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-import hashlib
 import json
+from json import JSONDecodeError
+from os.path import abspath, dirname
+
+import hashlib
 import os
+import requests
 import shutil
 import tempfile
 from abc import ABC, abstractmethod
-from json import JSONDecodeError
-from os.path import dirname, abspath
-from typing import Union, Iterator, List, Dict, Type, Tuple
-
-import requests
-from constant_sorrow.constants import REGISTRY_COMMITTED, NO_REGISTRY_SOURCE
+from constant_sorrow.constants import NO_REGISTRY_SOURCE, REGISTRY_COMMITTED
 from twisted.logger import Logger
+from typing import Dict, Iterator, List, Tuple, Type, Union
 
 from nucypher.blockchain.eth.constants import PREALLOCATION_ESCROW_CONTRACT_NAME
 from nucypher.blockchain.eth.networks import NetworksInventory

nucypher/blockchain/eth/signers.py

@@ -14,25 +14,23 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-from pathlib import Path
-
 import json
-import os
-from abc import ABC, abstractmethod
 from json import JSONDecodeError
-from typing import Dict, Tuple
-from typing import List
-from urllib.parse import urlparse
 
+import os
 import sys
+from abc import ABC, abstractmethod
 from cytoolz.dicttoolz import dissoc
 from eth_account import Account
 from eth_account.messages import encode_defunct
 from eth_account.signers.local import LocalAccount
-from eth_utils import is_address, to_checksum_address, apply_formatters_to_dict
+from eth_utils import apply_formatters_to_dict, is_address, to_checksum_address
 from hexbytes import HexBytes
+from pathlib import Path
 from twisted.logger import Logger
-from web3 import Web3, IPCProvider
+from typing import Dict, List, Tuple
+from urllib.parse import urlparse
+from web3 import IPCProvider, Web3
 
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.decorators import validate_checksum_address

nucypher/blockchain/eth/token.py

@@ -17,22 +17,16 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 from _pydecimal import Decimal
 from collections import UserList
-from typing import Dict
-from typing import Union, Tuple, Callable
 
 import maya
-from constant_sorrow.constants import (
-    NEW_STAKE,
-    NO_STAKING_RECEIPT,
-    NOT_STAKING,
-    EMPTY_STAKING_SLOT,
-    UNKNOWN_WORKER_STATUS
-)
+from constant_sorrow.constants import (EMPTY_STAKING_SLOT, NEW_STAKE, NOT_STAKING, NO_STAKING_RECEIPT,
+                                       UNKNOWN_WORKER_STATUS)
 from eth_utils import currency, is_checksum_address
-from twisted.internet import task, reactor
+from twisted.internet import reactor, task
 from twisted.logger import Logger
+from typing import Callable, Dict, Tuple, Union
 
-from nucypher.blockchain.eth.agents import StakingEscrowAgent, ContractAgency
+from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent
 from nucypher.blockchain.eth.decorators import validate_checksum_address
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.blockchain.eth.utils import datetime_at_period

nucypher/blockchain/eth/utils.py

@@ -15,12 +15,11 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-from decimal import Decimal
-from typing import Union
-
 import maya
 from constant_sorrow.constants import UNKNOWN_DEVELOPMENT_CHAIN_ID
-from eth_utils import is_address, to_checksum_address, is_hex
+from decimal import Decimal
+from eth_utils import is_address, is_hex, to_checksum_address
+from typing import Union
 from web3 import Web3
 from web3.contract import ContractConstructor, ContractFunction
 

nucypher/characters/base.py

@@ -16,48 +16,28 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 import contextlib
 from contextlib import suppress
-from typing import Dict, ClassVar, Set
-from typing import Optional
-from typing import Union, List
 
-from bytestring_splitter import BytestringSplitter
 from constant_sorrow import default_constant_splitter
-from constant_sorrow.constants import (
-    DO_NOT_SIGN,
-    NO_BLOCKCHAIN_CONNECTION,
-    NO_CONTROL_PROTOCOL,
-    NO_DECRYPTION_PERFORMED,
-    NO_NICKNAME,
-    NO_SIGNING_POWER,
-    SIGNATURE_TO_FOLLOW,
-    SIGNATURE_IS_ON_CIPHERTEXT,
-    STRANGER,
-    FEDERATED_ONLY
-)
+from constant_sorrow.constants import (DO_NOT_SIGN, NO_BLOCKCHAIN_CONNECTION, NO_CONTROL_PROTOCOL,
+                                       NO_DECRYPTION_PERFORMED, NO_NICKNAME, NO_SIGNING_POWER,
+                                       SIGNATURE_IS_ON_CIPHERTEXT, SIGNATURE_TO_FOLLOW, STRANGER)
 from cryptography.exceptions import InvalidSignature
 from eth_keys import KeyAPI as EthKeyAPI
-from eth_utils import to_checksum_address, to_canonical_address
+from eth_utils import to_canonical_address, to_checksum_address
+from typing import ClassVar, Dict, List, Optional, Set, Union
 from umbral.keys import UmbralPublicKey
 from umbral.signing import Signature
 
-from nucypher.blockchain.eth.agents import StakingEscrowAgent
-from nucypher.blockchain.eth.interfaces import BlockchainInterface
 from nucypher.blockchain.eth.registry import BaseContractRegistry, InMemoryContractRegistry
 from nucypher.blockchain.eth.signers import Signer
-from nucypher.characters.control.controllers import JSONRPCController, CLIController
+from nucypher.characters.control.controllers import CLIController, JSONRPCController
 from nucypher.config.keyring import NucypherKeyring
 from nucypher.config.node import CharacterConfiguration
 from nucypher.crypto.api import encrypt_and_sign
 from nucypher.crypto.kits import UmbralMessageKit
-from nucypher.crypto.powers import (
-    CryptoPower,
-    SigningPower,
-    DecryptingPower,
-    NoSigningPower,
-    CryptoPowerUp,
-    DelegatingPower
-)
-from nucypher.crypto.signing import signature_splitter, StrangerStamp, SignatureStamp
+from nucypher.crypto.powers import (CryptoPower, CryptoPowerUp, DecryptingPower, DelegatingPower, NoSigningPower,
+                                    SigningPower)
+from nucypher.crypto.signing import SignatureStamp, StrangerStamp, signature_splitter
 from nucypher.network.middleware import RestMiddleware
 from nucypher.network.nicknames import nickname_from_seed
 from nucypher.network.nodes import Learner

nucypher/characters/chaotic.py

@@ -1,33 +1,30 @@
 import json
-import os
-from datetime import datetime, timedelta
-from decimal import Decimal
 
 import eth_utils
 import math
 import maya
+import os
 import time
 from constant_sorrow.constants import NOT_RUNNING, NO_DATABASE_AVAILABLE
+from datetime import datetime, timedelta
+from decimal import Decimal
 from flask import Flask, Response
 from hendrix.deploy.base import HendrixDeploy
 from nacl.hash import sha256
 from sqlalchemy import create_engine, or_
-from twisted.internet import threads, reactor
+from twisted.internet import reactor, threads
 from twisted.internet.task import LoopingCall
 from twisted.logger import Logger
 
 from nucypher.blockchain.economics import EconomicsFactory
 from nucypher.blockchain.eth.actors import NucypherTokenActor
-from nucypher.blockchain.eth.agents import (
-    NucypherTokenAgent,
-    ContractAgency
-)
+from nucypher.blockchain.eth.agents import (ContractAgency, NucypherTokenAgent)
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.blockchain.eth.token import NU
 from nucypher.characters.banners import FELIX_BANNER, NU_BANNER
 from nucypher.characters.base import Character
-from nucypher.config.constants import TEMPLATES_DIR, MAX_UPLOAD_CONTENT_LENGTH
+from nucypher.config.constants import MAX_UPLOAD_CONTENT_LENGTH, TEMPLATES_DIR
 from nucypher.crypto.powers import SigningPower, TransactingPower
 from nucypher.datastore.threading import ThreadedSession
 

nucypher/characters/control/controllers.py

@@ -1,19 +1,19 @@
-import inspect
 import json
-from abc import ABC, abstractmethod
 from json import JSONDecodeError
 
+import inspect
 import maya
-from flask import Response, Flask
+from abc import ABC, abstractmethod
+from flask import Flask, Response
 from hendrix.deploy.base import HendrixDeploy
 from twisted.internet import reactor, stdio
 from twisted.logger import Logger
 
-from nucypher.characters.control.emitters import StdoutEmitter, WebEmitter, JSONRPCStdoutEmitter
+from nucypher.characters.control.emitters import JSONRPCStdoutEmitter, StdoutEmitter, WebEmitter
 from nucypher.characters.control.interfaces import CharacterPublicInterface
 from nucypher.characters.control.specifications.exceptions import SpecificationError
-from nucypher.config.constants import MAX_UPLOAD_CONTENT_LENGTH
 from nucypher.cli.processes import JSONRPCLineReceiver
+from nucypher.config.constants import MAX_UPLOAD_CONTENT_LENGTH
 from tests.utils.controllers import JSONRPCTestClient
 
 

nucypher/characters/control/emitters.py

@@ -1,14 +1,11 @@
-import io
 import json
-import os
-
-import sys
-from functools import partial
-from typing import Callable, Union
 
 import click
+import os
 from flask import Response
+from functools import partial
 from twisted.logger import Logger
+from typing import Callable, Union
 
 import nucypher
 

nucypher/characters/control/interfaces.py

@@ -1,8 +1,6 @@
 import functools
-from base64 import b64decode
-from typing import Union
-
 import maya
+from typing import Union
 from umbral.keys import UmbralPublicKey
 
 from nucypher.characters.control.specifications import alice, bob, enrico

nucypher/characters/control/specifications/alice.py

@@ -1,10 +1,10 @@
 import click
 from marshmallow import validates_schema
 
-from nucypher.characters.control.specifications.exceptions import (
-    InvalidInputData, InvalidArgumentCombo)
 from nucypher.characters.control.specifications import fields
 from nucypher.characters.control.specifications.base import BaseSchema
+from nucypher.characters.control.specifications.exceptions import (
+    InvalidArgumentCombo)
 from nucypher.cli import options, types
 
 

nucypher/characters/control/specifications/base.py

@@ -1,6 +1,5 @@
-from functools import wraps
+from marshmallow import INCLUDE, Schema
 
-from marshmallow import Schema, INCLUDE, EXCLUDE
 from nucypher.characters.control.specifications.exceptions import InvalidInputData
 
 

nucypher/characters/control/specifications/bob.py

@@ -1,7 +1,8 @@
 import click
-from nucypher.cli import options
+
 from nucypher.characters.control.specifications import fields
 from nucypher.characters.control.specifications.base import BaseSchema
+from nucypher.cli import options
 
 
 class JoinPolicy(BaseSchema):  #TODO:  this doesn't have a cli implementation

nucypher/characters/control/specifications/enrico.py

@@ -1,7 +1,8 @@
 import click
-from nucypher.cli import options
+
 from nucypher.characters.control.specifications import fields
 from nucypher.characters.control.specifications.base import BaseSchema
+from nucypher.cli import options
 
 
 class EncryptMessage(BaseSchema):

nucypher/characters/control/specifications/fields/cleartext.py

@@ -1,7 +1,10 @@
-from base64 import b64decode, b64encode
+from base64 import b64encode
+
 from marshmallow import fields
+
 from nucypher.characters.control.specifications.fields.base import BaseField
 
+
 class Cleartext(BaseField, fields.String):
 
     def _serialize(self, value, attr, data, **kwargs):

nucypher/characters/control/specifications/fields/datetime.py

@@ -1,5 +1,6 @@
-from marshmallow import fields
 import maya
+from marshmallow import fields
+
 from nucypher.characters.control.specifications.fields.base import BaseField
 
 

nucypher/characters/control/specifications/fields/key.py

@@ -1,7 +1,9 @@
 from marshmallow import fields
 from umbral.keys import UmbralPublicKey
-from nucypher.characters.control.specifications.fields.base import BaseField
+
 from nucypher.characters.control.specifications.exceptions import InvalidInputData, InvalidNativeDataTypes
+from nucypher.characters.control.specifications.fields.base import BaseField
+
 
 class Key(BaseField, fields.Field):
 

nucypher/characters/control/specifications/fields/label.py

@@ -1,6 +1,7 @@
-from nucypher.characters.control.specifications.fields.base import BaseField
 from marshmallow import fields
 
+from nucypher.characters.control.specifications.fields.base import BaseField
+
 
 class Label(BaseField, fields.Field):
 

nucypher/characters/control/specifications/fields/messagekit.py

@@ -1,8 +1,10 @@
 from base64 import b64decode, b64encode
+
 from marshmallow import fields
+
+from nucypher.characters.control.specifications.exceptions import InvalidInputData, InvalidNativeDataTypes
 from nucypher.characters.control.specifications.fields.base import BaseField
 from nucypher.crypto.kits import UmbralMessageKit as UmbralMessageKitClass
-from nucypher.characters.control.specifications.exceptions import InvalidInputData, InvalidNativeDataTypes
 
 
 class UmbralMessageKit(BaseField, fields.Field):

nucypher/characters/control/specifications/fields/misc.py

@@ -1,7 +1,8 @@
 import click
 from marshmallow import fields
-from nucypher.characters.control.specifications.fields.base import BaseField
+
 from nucypher.characters.control.specifications.exceptions import InvalidInputData
+from nucypher.characters.control.specifications.fields.base import BaseField
 from nucypher.cli import types
 
 

nucypher/characters/control/specifications/fields/treasuremap.py

@@ -1,11 +1,13 @@
-from marshmallow import fields
 from base64 import b64decode, b64encode
+
 from bytestring_splitter import BytestringSplitter, VariableLengthBytestring
-from nucypher.characters.control.specifications.fields.base import BaseField
+from marshmallow import fields
+
 from nucypher.characters.control.specifications.exceptions import InvalidInputData, InvalidNativeDataTypes
-from nucypher.crypto.signing import Signature
+from nucypher.characters.control.specifications.fields.base import BaseField
 from nucypher.crypto.constants import KECCAK_DIGEST_LENGTH
 from nucypher.crypto.kits import UmbralMessageKit
+from nucypher.crypto.signing import Signature
 
 
 class TreasureMap(BaseField, fields.Field):

nucypher/characters/lawful.py

@@ -16,31 +16,30 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import json
-from base64 import b64encode, b64decode
+from base64 import b64decode, b64encode
 from collections import OrderedDict
-from datetime import datetime
-from functools import partial
-from json.decoder import JSONDecodeError
 from random import shuffle
-from typing import Dict, Iterable, List, Set, Tuple, Union
 
 import maya
 import time
-from bytestring_splitter import BytestringKwargifier, BytestringSplittingError
-from bytestring_splitter import BytestringSplitter, VariableLengthBytestring
+from bytestring_splitter import BytestringKwargifier, BytestringSplitter, BytestringSplittingError, \
+    VariableLengthBytestring
 from constant_sorrow import constants
 from constant_sorrow.constants import INCLUDED_IN_BYTESTRING, PUBLIC_ONLY, STRANGER_ALICE
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurve
 from cryptography.hazmat.primitives.serialization import Encoding
-from cryptography.x509 import load_pem_x509_certificate, Certificate, NameOID
+from cryptography.x509 import Certificate, NameOID, load_pem_x509_certificate
+from datetime import datetime
 from eth_utils import to_checksum_address
-from flask import request, Response
+from flask import Response, request
+from functools import partial
+from json.decoder import JSONDecodeError
 from sqlalchemy.exc import OperationalError
-from twisted.internet import stdio, reactor
-from twisted.internet import threads
+from twisted.internet import reactor, stdio, threads
 from twisted.internet.task import LoopingCall
 from twisted.logger import Logger
+from typing import Dict, Iterable, List, Set, Tuple, Union
 from umbral import pre
 from umbral.keys import UmbralPublicKey
 from umbral.kfrags import KFrag
@@ -49,7 +48,7 @@ from umbral.signing import Signature
 
 import nucypher
 from nucypher.blockchain.eth.actors import BlockchainPolicyAuthor, Worker
-from nucypher.blockchain.eth.agents import StakingEscrowAgent, ContractAgency
+from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent
 from nucypher.blockchain.eth.interfaces import BlockchainInterfaceFactory
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.blockchain.eth.signers import Web3Signer
@@ -62,22 +61,21 @@ from nucypher.characters.control.controllers import (
 from nucypher.characters.control.emitters import StdoutEmitter
 from nucypher.characters.control.interfaces import AliceInterface, BobInterface, EnricoInterface
 from nucypher.cli.processes import UrsulaCommandProtocol
-from nucypher.config.storages import NodeStorage, ForgetfulNodeStorage
-from nucypher.crypto.api import keccak_digest, encrypt_and_sign
-from nucypher.crypto.constants import PUBLIC_KEY_LENGTH, PUBLIC_ADDRESS_LENGTH
+from nucypher.config.storages import ForgetfulNodeStorage, NodeStorage
+from nucypher.crypto.api import encrypt_and_sign, keccak_digest
+from nucypher.crypto.constants import PUBLIC_ADDRESS_LENGTH, PUBLIC_KEY_LENGTH
 from nucypher.crypto.kits import UmbralMessageKit
-from nucypher.crypto.powers import SigningPower, DecryptingPower, DelegatingPower, TransactingPower, PowerUpError
+from nucypher.crypto.powers import DecryptingPower, DelegatingPower, PowerUpError, SigningPower, TransactingPower
 from nucypher.crypto.signing import InvalidSignature
 from nucypher.datastore.keypairs import HostingKeypair
 from nucypher.datastore.threading import ThreadedSession
 from nucypher.network.exceptions import NodeSeemsToBeDown
 from nucypher.network.middleware import RestMiddleware
 from nucypher.network.nicknames import nickname_from_seed
-from nucypher.network.nodes import NodeSprout
-from nucypher.network.nodes import Teacher
+from nucypher.network.nodes import NodeSprout, Teacher
 from nucypher.network.protocols import InterfaceInfo, parse_node_uri
-from nucypher.network.trackers import AvailabilityTracker
 from nucypher.network.server import ProxyRESTServer, TLSHostingPower, make_rest_app
+from nucypher.network.trackers import AvailabilityTracker
 
 
 class Alice(Character, BlockchainPolicyAuthor):

nucypher/characters/unlawful.py

@@ -15,11 +15,11 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 from copy import copy
-from unittest.mock import patch
 
 from eth_tester.exceptions import ValidationError
+from unittest.mock import patch
 
-from nucypher.characters.lawful import Ursula, Alice
+from nucypher.characters.lawful import Alice, Ursula
 from nucypher.crypto.powers import CryptoPower, SigningPower
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD, MOCK_URSULA_DB_FILEPATH
 from tests.utils.middleware import EvilMiddleWare

nucypher/cli/commands/deploy.py

@@ -40,8 +40,12 @@ from nucypher.characters.control.emitters import StdoutEmitter
 from nucypher.cli.actions.auth import get_client_password
 from nucypher.cli.actions.confirm import confirm_deployment
 from nucypher.cli.actions.select import select_client_account
-from nucypher.cli.actions.utils import (deployer_pre_launch_warnings, ensure_config_root, establish_deployer_registry,
-                                        initialize_deployer_interface)
+from nucypher.cli.actions.utils import (
+    deployer_pre_launch_warnings,
+    ensure_config_root,
+    establish_deployer_registry,
+    initialize_deployer_interface
+)
 from nucypher.cli.config import group_general_config
 from nucypher.cli.literature import (
     CANNOT_OVERWRITE_REGISTRY,

nucypher/config/base.py

@@ -1,11 +1,11 @@
 import json
+
 import os
 from abc import ABC, abstractmethod
-from typing import Union
-
 from constant_sorrow.constants import (
     UNKNOWN_VERSION
 )
+from typing import Union
 
 from nucypher.config import constants
 

nucypher/config/characters.py

@@ -17,14 +17,13 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-from tempfile import TemporaryDirectory
-
 from constant_sorrow.constants import (
     UNINITIALIZED_CONFIGURATION
 )
 from cryptography.hazmat.primitives.asymmetric import ec
 from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurve
 from cryptography.x509 import Certificate
+from tempfile import TemporaryDirectory
 
 from nucypher.blockchain.eth.actors import StakeHolder
 from nucypher.blockchain.eth.signers import Signer

nucypher/config/constants.py

@@ -16,10 +16,10 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 
-import os
 from collections import namedtuple
 from os.path import abspath, dirname
 
+import os
 from appdirs import AppDirs
 
 import nucypher

nucypher/config/keyring.py

@@ -17,14 +17,12 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 import base64
 import contextlib
 import json
-import os
 import stat
 from json import JSONDecodeError
 from os.path import abspath
-from typing import ClassVar, Tuple, Callable, Union, Dict, List
 
-from constant_sorrow.constants import FEDERATED_ADDRESS
-from constant_sorrow.constants import KEYRING_LOCKED
+import os
+from constant_sorrow.constants import FEDERATED_ADDRESS, KEYRING_LOCKED
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.backends.openssl.ec import _EllipticCurvePrivateKey
@@ -40,17 +38,13 @@ from eth_utils import to_checksum_address
 from nacl.exceptions import CryptoError
 from nacl.secret import SecretBox
 from twisted.logger import Logger
-from umbral.keys import UmbralPrivateKey, UmbralPublicKey, UmbralKeyingMaterial, derive_key_from_password
+from typing import Callable, ClassVar, Dict, List, Tuple, Union
+from umbral.keys import UmbralKeyingMaterial, UmbralPrivateKey, UmbralPublicKey, derive_key_from_password
 
 from nucypher.config.constants import DEFAULT_CONFIG_ROOT
 from nucypher.crypto.api import generate_teacher_certificate
 from nucypher.crypto.constants import BLAKE2B
-from nucypher.crypto.powers import (
-    SigningPower,
-    DecryptingPower,
-    KeyPairBasedPower,
-    DerivedKeyBasedPower
-)
+from nucypher.crypto.powers import (DecryptingPower, DerivedKeyBasedPower, KeyPairBasedPower, SigningPower)
 from nucypher.network.server import TLSHostingPower
 
 FILE_ENCODING = 'utf-8'

nucypher/config/node.py

@@ -17,18 +17,11 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
+from constant_sorrow.constants import (DEVELOPMENT_CONFIGURATION, FEDERATED_ADDRESS, LIVE_CONFIGURATION,
+                                       NO_BLOCKCHAIN_CONNECTION, NO_KEYRING_ATTACHED, UNINITIALIZED_CONFIGURATION)
 from tempfile import TemporaryDirectory
-from typing import List, Set, Union, Callable
-
-from constant_sorrow.constants import (
-    UNINITIALIZED_CONFIGURATION,
-    NO_BLOCKCHAIN_CONNECTION,
-    LIVE_CONFIGURATION,
-    NO_KEYRING_ATTACHED,
-    DEVELOPMENT_CONFIGURATION,
-    FEDERATED_ADDRESS
-)
 from twisted.logger import Logger
+from typing import Callable, List, Set, Union
 from umbral.signing import Signature
 
 from nucypher.blockchain.eth.interfaces import BlockchainInterfaceFactory
@@ -41,8 +34,8 @@ from nucypher.blockchain.eth.registry import (
 from nucypher.blockchain.eth.signers import Signer
 from nucypher.config.base import BaseConfiguration
 from nucypher.config.keyring import NucypherKeyring
-from nucypher.config.storages import NodeStorage, ForgetfulNodeStorage, LocalFileBasedNodeStorage
-from nucypher.crypto.powers import CryptoPowerUp, CryptoPower
+from nucypher.config.storages import ForgetfulNodeStorage, LocalFileBasedNodeStorage, NodeStorage
+from nucypher.crypto.powers import CryptoPower, CryptoPowerUp
 from nucypher.network.middleware import RestMiddleware
 
 

nucypher/config/storages.py

@@ -15,20 +15,20 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import binascii
-import os
 import sqlite3
-import tempfile
-from abc import abstractmethod, ABC
-from typing import Callable, Tuple, Union, Set, Any
 
 import OpenSSL
+import binascii
+import os
+import tempfile
+from abc import ABC, abstractmethod
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.serialization import Encoding
 from cryptography.x509 import Certificate, NameOID
 from eth_utils import is_checksum_address
 from twisted.logger import Logger
+from typing import Any, Callable, Set, Tuple, Union
 
 from nucypher.blockchain.eth.decorators import validate_checksum_address
 from nucypher.blockchain.eth.registry import BaseContractRegistry

nucypher/crypto/api.py

@@ -14,11 +14,9 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-import datetime
-from ipaddress import IPv4Address
 from random import SystemRandom
-from typing import Tuple
 
+import datetime
 import sha3
 from constant_sorrow import constants
 from cryptography import x509
@@ -33,7 +31,9 @@ from cryptography.x509 import Certificate
 from cryptography.x509.oid import NameOID
 from eth_account import Account
 from eth_account.messages import encode_defunct
-from eth_utils import to_checksum_address, is_checksum_address
+from eth_utils import is_checksum_address, to_checksum_address
+from ipaddress import IPv4Address
+from typing import Tuple
 from umbral import pre
 from umbral.keys import UmbralPrivateKey, UmbralPublicKey
 from umbral.signing import Signature

nucypher/crypto/kits.py

@@ -14,9 +14,10 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-from constant_sorrow.constants import UNKNOWN_SENDER, NOT_SIGNED
 from bytestring_splitter import BytestringKwargifier, VariableLengthBytestring
-from nucypher.crypto.splitters import key_splitter, capsule_splitter
+from constant_sorrow.constants import NOT_SIGNED, UNKNOWN_SENDER
+
+from nucypher.crypto.splitters import capsule_splitter, key_splitter
 
 
 class CryptoKit:

nucypher/crypto/powers.py

@@ -17,17 +17,16 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import inspect
-from typing import List, Tuple, Optional
-
 from hexbytes import HexBytes
+from typing import List, Optional, Tuple
 from umbral import pre
-from umbral.keys import UmbralPublicKey, UmbralPrivateKey, UmbralKeyingMaterial
+from umbral.keys import UmbralKeyingMaterial, UmbralPrivateKey, UmbralPublicKey
 
 from nucypher.blockchain.eth.decorators import validate_checksum_address
-from nucypher.blockchain.eth.interfaces import BlockchainInterfaceFactory, BlockchainInterface
+from nucypher.blockchain.eth.interfaces import BlockchainInterface, BlockchainInterfaceFactory
 from nucypher.blockchain.eth.signers import Signer, Web3Signer
 from nucypher.datastore import keypairs
-from nucypher.datastore.keypairs import SigningKeypair, DecryptingKeypair
+from nucypher.datastore.keypairs import DecryptingKeypair, SigningKeypair
 
 
 class PowerUpError(TypeError):

nucypher/crypto/splitters.py

@@ -19,7 +19,7 @@ from umbral.config import default_params
 from umbral.keys import UmbralPublicKey
 from umbral.pre import Capsule
 
-from nucypher.crypto.constants import PUBLIC_KEY_LENGTH, CAPSULE_LENGTH
+from nucypher.crypto.constants import CAPSULE_LENGTH, PUBLIC_KEY_LENGTH
 
 key_splitter = BytestringSplitter((UmbralPublicKey, PUBLIC_KEY_LENGTH))
 capsule_splitter = BytestringSplitter((Capsule, CAPSULE_LENGTH, {"params": default_params()}))

nucypher/crypto/utils.py

@@ -15,10 +15,9 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-from typing import Any, Union
-
 from coincurve import PublicKey
 from eth_keys import KeyAPI as EthKeyAPI
+from typing import Any, Union
 from umbral.keys import UmbralPublicKey
 from umbral.point import Point
 from umbral.signing import Signature

nucypher/datastore/datastore.py

@@ -16,13 +16,12 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 
-from datetime import datetime
-from typing import List
-
 import maya
 from bytestring_splitter import BytestringSplitter
+from datetime import datetime
 from sqlalchemy.exc import OperationalError
 from sqlalchemy.orm import sessionmaker
+from typing import List
 from umbral.keys import UmbralPublicKey
 from umbral.kfrags import KFrag
 

nucypher/datastore/db/models.py

@@ -15,10 +15,7 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 from datetime import datetime
-
-from sqlalchemy import (
-    Column, Integer, LargeBinary, ForeignKey, Boolean, DateTime
-)
+from sqlalchemy import (Boolean, Column, DateTime, ForeignKey, Integer, LargeBinary)
 from sqlalchemy.orm import relationship
 
 from nucypher.crypto.utils import fingerprint_from_key

nucypher/datastore/keypairs.py

@@ -15,7 +15,6 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 import base64
-from typing import Union
 
 import sha3
 from OpenSSL.SSL import TLSv1_2_METHOD
@@ -24,6 +23,7 @@ from constant_sorrow import constants
 from cryptography.hazmat.primitives.asymmetric import ec
 from hendrix.deploy.tls import HendrixDeployTLS
 from hendrix.facilities.services import ExistingKeyTLSContextFactory
+from typing import Union
 from umbral import pre
 from umbral.keys import UmbralPrivateKey, UmbralPublicKey
 from umbral.signing import Signature, Signer

nucypher/datastore/threading.py

@@ -14,7 +14,7 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-from sqlalchemy.orm import sessionmaker, scoped_session
+from sqlalchemy.orm import scoped_session, sessionmaker
 
 
 class ThreadedSession:

nucypher/network/exceptions.py

@@ -1,4 +1,5 @@
-import requests, socket
+import requests
+import socket
 
 NodeSeemsToBeDown = (requests.exceptions.ConnectionError,
                      requests.exceptions.ReadTimeout,

nucypher/network/middleware.py

@@ -16,17 +16,15 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 
+import requests
 import socket
 import ssl
-
-import requests
 import time
 from bytestring_splitter import BytestringSplitter, VariableLengthBytestring
 from constant_sorrow.constants import CERTIFICATE_NOT_SAVED, EXEMPT_FROM_VERIFICATION
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend
 from twisted.logger import Logger
-
 from umbral.cfrags import CapsuleFrag
 from umbral.signing import Signature
 

nucypher/network/nodes.py

@@ -15,50 +15,39 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import binascii
 import contextlib
 import random
-from collections import defaultdict, OrderedDict
-from collections import deque
-from collections import namedtuple
+from collections import OrderedDict, defaultdict, deque, namedtuple
 from contextlib import suppress
-from typing import Set, Tuple, Union
 
+import binascii
 import maya
 import requests
 import time
-from bytestring_splitter import BytestringSplitter, PartiallyKwargifiedBytes
-from bytestring_splitter import VariableLengthBytestring, BytestringSplittingError
+from bytestring_splitter import BytestringSplitter, BytestringSplittingError, PartiallyKwargifiedBytes, \
+    VariableLengthBytestring
 from constant_sorrow import constant_or_bytes
-from constant_sorrow.constants import (
-    NO_KNOWN_NODES,
-    NOT_SIGNED,
-    NEVER_SEEN,
-    NO_STORAGE_AVAILIBLE,
-    FLEET_STATES_MATCH,
-    CERTIFICATE_NOT_SAVED,
-    UNKNOWN_FLEET_STATE
-)
+from constant_sorrow.constants import (CERTIFICATE_NOT_SAVED, FLEET_STATES_MATCH, NEVER_SEEN, NOT_SIGNED,
+                                       NO_KNOWN_NODES, NO_STORAGE_AVAILIBLE, UNKNOWN_FLEET_STATE)
 from cryptography.x509 import Certificate
 from eth_utils import to_checksum_address
 from requests.exceptions import SSLError
-from twisted.internet import reactor, defer
-from twisted.internet import task
+from twisted.internet import defer, reactor, task
 from twisted.internet.threads import deferToThread
 from twisted.logger import Logger
-
-import nucypher
+from typing import Set, Tuple, Union
 from umbral.signing import Signature
 
+import nucypher
 from nucypher.blockchain.economics import EconomicsFactory
 from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from nucypher.config.constants import SeednodeMetadata
 from nucypher.config.storages import ForgetfulNodeStorage
-from nucypher.crypto.api import keccak_digest, verify_eip_191, recover_address_eip_191
+from nucypher.crypto.api import keccak_digest, recover_address_eip_191, verify_eip_191
 from nucypher.crypto.kits import UmbralMessageKit
-from nucypher.crypto.powers import TransactingPower, SigningPower, DecryptingPower, NoSigningPower
+from nucypher.crypto.powers import DecryptingPower, NoSigningPower, SigningPower, TransactingPower
 from nucypher.crypto.signing import signature_splitter
 from nucypher.network import LEARNING_LOOP_VERSION
 from nucypher.network.exceptions import NodeSeemsToBeDown

nucypher/network/protocols.py

@@ -14,11 +14,9 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-from urllib.parse import urlparse
-
-from eth_utils import is_checksum_address
-
 from bytestring_splitter import VariableLengthBytestring
+from eth_utils import is_checksum_address
+from urllib.parse import urlparse
 
 
 class SuspiciousActivity(RuntimeError):

nucypher/network/server.py

@@ -16,33 +16,28 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import binascii
-import json
 import os
-from typing import Tuple
-
-import requests
 from bytestring_splitter import BytestringSplitter
 from constant_sorrow import constants
-from constant_sorrow.constants import FLEET_STATES_MATCH, NO_KNOWN_NODES
-from constant_sorrow.constants import NO_BLOCKCHAIN_CONNECTION
-from flask import Flask, Response, request
-from flask import jsonify
+from constant_sorrow.constants import FLEET_STATES_MATCH, NO_BLOCKCHAIN_CONNECTION, NO_KNOWN_NODES
+from flask import Flask, Response, jsonify, request
 from hendrix.experience import crosstown_traffic
 from jinja2 import Template, TemplateError
 from twisted.logger import Logger
+from typing import Tuple
 from umbral.keys import UmbralPublicKey
 from umbral.kfrags import KFrag
 from web3.exceptions import TimeExhausted
 
 import nucypher
-from nucypher.config.storages import ForgetfulNodeStorage
 from nucypher.config.constants import MAX_UPLOAD_CONTENT_LENGTH
+from nucypher.config.storages import ForgetfulNodeStorage
 from nucypher.crypto.kits import UmbralMessageKit
 from nucypher.crypto.powers import KeyPairBasedPower, PowerUpError
 from nucypher.crypto.signing import InvalidSignature
 from nucypher.crypto.utils import canonical_address_from_umbral_key
-from nucypher.datastore.keypairs import HostingKeypair
 from nucypher.datastore.datastore import NotFound
+from nucypher.datastore.keypairs import HostingKeypair
 from nucypher.datastore.threading import ThreadedSession
 from nucypher.network import LEARNING_LOOP_VERSION
 from nucypher.network.exceptions import NodeSeemsToBeDown

nucypher/network/trackers.py

@@ -1,10 +1,10 @@
 import random
-from typing import Union
 
 import maya
 from twisted.internet import reactor
 from twisted.internet.task import LoopingCall
 from twisted.logger import Logger
+from typing import Union
 
 from nucypher.network.exceptions import NodeSeemsToBeDown
 from nucypher.network.middleware import RestMiddleware

nucypher/policy/collections.py

@@ -16,19 +16,18 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 
-import binascii
 import json
 from collections import OrderedDict
-from typing import List, Optional, Tuple
 
+import binascii
 import maya
 import msgpack
-from bytestring_splitter import BytestringSplitter, VariableLengthBytestring, BytestringSplittingError
-from constant_sorrow.constants import CFRAG_NOT_RETAINED
-from constant_sorrow.constants import NO_DECRYPTION_PERFORMED
+from bytestring_splitter import BytestringSplitter, BytestringSplittingError, VariableLengthBytestring
+from constant_sorrow.constants import CFRAG_NOT_RETAINED, NO_DECRYPTION_PERFORMED
 from cryptography.hazmat.backends.openssl import backend
 from cryptography.hazmat.primitives import hashes
 from eth_utils import to_canonical_address, to_checksum_address
+from typing import List, Optional, Tuple
 from umbral.cfrags import CapsuleFrag
 from umbral.config import default_params
 from umbral.curvebn import CurveBN
@@ -36,11 +35,11 @@ from umbral.keys import UmbralPublicKey
 from umbral.pre import Capsule
 
 from nucypher.characters.lawful import Bob, Character
-from nucypher.crypto.api import keccak_digest, encrypt_and_sign
-from nucypher.crypto.constants import PUBLIC_ADDRESS_LENGTH, KECCAK_DIGEST_LENGTH
+from nucypher.crypto.api import encrypt_and_sign, keccak_digest
+from nucypher.crypto.constants import KECCAK_DIGEST_LENGTH, PUBLIC_ADDRESS_LENGTH
 from nucypher.crypto.kits import UmbralMessageKit
-from nucypher.crypto.signing import Signature, InvalidSignature, signature_splitter
-from nucypher.crypto.splitters import key_splitter, capsule_splitter
+from nucypher.crypto.signing import InvalidSignature, Signature, signature_splitter
+from nucypher.crypto.splitters import capsule_splitter, key_splitter
 from nucypher.crypto.utils import (canonical_address_from_umbral_key,
                                    get_coordinates_as_bytes,
                                    get_signature_recovery_value)

nucypher/policy/policies.py

@@ -16,21 +16,21 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import random
-from abc import abstractmethod, ABC
 from collections import OrderedDict, deque
-from typing import Generator, Set, List
 
 import maya
+from abc import ABC, abstractmethod
 from bytestring_splitter import BytestringSplitter, VariableLengthBytestring
-from constant_sorrow.constants import NOT_SIGNED, UNKNOWN_KFRAG, FEDERATED_POLICY, UNKNOWN_ARRANGEMENTS
+from constant_sorrow.constants import NOT_SIGNED, UNKNOWN_KFRAG
 from twisted.logger import Logger
+from typing import Generator, List, Set
 from umbral.keys import UmbralPublicKey
 from umbral.kfrags import KFrag
 
 from nucypher.blockchain.eth.actors import BlockchainPolicyAuthor
-from nucypher.blockchain.eth.agents import StakingEscrowAgent, PolicyManagerAgent
+from nucypher.blockchain.eth.agents import PolicyManagerAgent, StakingEscrowAgent
 from nucypher.characters.lawful import Alice, Ursula
-from nucypher.crypto.api import secure_random, keccak_digest
+from nucypher.crypto.api import keccak_digest, secure_random
 from nucypher.crypto.constants import PUBLIC_KEY_LENGTH
 from nucypher.crypto.kits import RevocationKit
 from nucypher.crypto.powers import DecryptingPower, SigningPower

nucypher/utilities/logging.py

@@ -15,16 +15,15 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import pathlib
 from contextlib import contextmanager
 
-from twisted.logger import FileLogObserver, jsonFileLogObserver, formatEvent, formatEventAsClassicLogText
-from twisted.logger import LogLevel
-from twisted.logger import globalLogPublisher
+import pathlib
+from twisted.logger import FileLogObserver, LogLevel, formatEvent, formatEventAsClassicLogText, globalLogPublisher, \
+    jsonFileLogObserver
 from twisted.python.logfile import LogFile
 
 import nucypher
-from nucypher.config.constants import USER_LOG_DIR, NUCYPHER_SENTRY_ENDPOINT
+from nucypher.config.constants import NUCYPHER_SENTRY_ENDPOINT, USER_LOG_DIR
 
 ONE_MEGABYTE = 1_048_576
 MAXIMUM_LOG_SIZE = ONE_MEGABYTE * 10

tests/blockchain/eth/clients/test_geth_integration.py

@@ -1,15 +1,11 @@
 import os
-
 import pytest
-from eth_utils import is_checksum_address
-from eth_utils import to_checksum_address
+from eth_utils import is_checksum_address, to_checksum_address
 
 from nucypher.blockchain.eth.actors import ContractAdministrator
-from nucypher.blockchain.eth.interfaces import BlockchainInterface, BlockchainDeployerInterface, \
+from nucypher.blockchain.eth.interfaces import BlockchainDeployerInterface, BlockchainInterface, \
     BlockchainInterfaceFactory
 from nucypher.crypto.api import verify_eip_191
-
-
 #
 # NOTE: This module is skipped on CI
 #

tests/blockchain/eth/clients/test_keystore_signer.py

@@ -1,17 +1,14 @@
-import shutil
-
 import json
 
-from pathlib import Path
-
 import os
-
 import pytest
+import shutil
 from cytoolz.dicttoolz import assoc
 from eth_account import Account
 from eth_account._utils.transactions import Transaction
 from eth_utils import to_checksum_address
 from hexbytes import HexBytes
+from pathlib import Path
 
 from nucypher.blockchain.eth.signers import KeystoreSigner, Signer
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD

tests/blockchain/eth/clients/test_mocked_clients.py

@@ -1,16 +1,9 @@
 import datetime
-
 import pytest
 from web3 import HTTPProvider, IPCProvider, WebsocketProvider
 
-from nucypher.blockchain.eth.clients import (
-    EthereumClient,
-    GethClient,
-    ParityClient,
-    GanacheClient,
-    InfuraClient,
-    PUBLIC_CHAINS
-)
+from nucypher.blockchain.eth.clients import (EthereumClient, GanacheClient, GethClient, InfuraClient, PUBLIC_CHAINS,
+                                             ParityClient)
 from nucypher.blockchain.eth.interfaces import BlockchainInterface
 
 

tests/blockchain/eth/contracts/integration/test_contract_economics.py

@@ -16,7 +16,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import pytest
-from nucypher.utilities.sandbox.constants import INSECURE_DEVELOPMENT_PASSWORD
 
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD
 

tests/blockchain/eth/contracts/integration/test_intercontract_integration.py

@@ -17,7 +17,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
 from eth_utils import to_canonical_address, to_wei

tests/blockchain/eth/contracts/lib/test_reencryption_validator.py

@@ -17,14 +17,12 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 import os
 import pytest
-
 from eth_tester.exceptions import TransactionFailed
-
 from umbral.config import default_params
 from umbral.curvebn import CurveBN
 from umbral.keys import UmbralPrivateKey
 from umbral.point import Point
-from umbral.random_oracles import hash_to_curvebn, ExtendedKeccak
+from umbral.random_oracles import ExtendedKeccak, hash_to_curvebn
 from umbral.signing import Signer
 
 from nucypher.crypto.signing import SignatureStamp

tests/blockchain/eth/contracts/lib/test_signature_verifier.py

@@ -17,20 +17,18 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from cryptography.hazmat.backends.openssl import backend
 from cryptography.hazmat.primitives import hashes
 from eth_account.account import Account
-from eth_account.messages import encode_defunct, SignableMessage, HexBytes
+from eth_account.messages import HexBytes, SignableMessage, encode_defunct
 from eth_tester.exceptions import TransactionFailed
-from eth_utils import to_normalized_address, to_checksum_address, to_canonical_address
-
+from eth_utils import to_canonical_address, to_checksum_address, to_normalized_address
 from umbral.keys import UmbralPrivateKey
 from umbral.signing import Signer
 
 from nucypher.crypto.api import keccak_digest, verify_eip_191
-from nucypher.crypto.utils import get_signature_recovery_value, canonical_address_from_umbral_key
+from nucypher.crypto.utils import canonical_address_from_umbral_key, get_signature_recovery_value
 
 ALGORITHM_KECCAK256 = 0
 ALGORITHM_SHA256 = 1

tests/blockchain/eth/contracts/lib/test_umbral_deserializer.py

@@ -17,11 +17,9 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
-
-from umbral import pre, keys
+from umbral import keys, pre
 from umbral.signing import Signer
 
 

tests/blockchain/eth/contracts/main/adjudicator/test_adjudicator.py

@@ -17,19 +17,15 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
-from eth_utils import keccak
 from typing import Tuple
-from web3.contract import Contract
-
 from umbral.keys import UmbralPrivateKey
 from umbral.point import Point
+from web3.contract import Contract
 
 from nucypher.crypto.api import sha256_digest
 
-
 ALGORITHM_KECCAK256 = 0
 ALGORITHM_SHA256 = 1
 

tests/blockchain/eth/contracts/main/policy_manager/test_policy_manager.py

@@ -17,7 +17,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
 from eth_utils import to_canonical_address

tests/blockchain/eth/contracts/main/policy_manager/test_policy_manager_operations.py

@@ -17,7 +17,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
 

tests/blockchain/eth/contracts/main/staking_contracts/conftest.py

@@ -15,12 +15,11 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-
-import os
 import pytest
 
 from nucypher.blockchain.eth.token import NU
 
+
 @pytest.fixture()
 def token(testerchain, deploy_contract):
     # Create an ERC20 token

tests/blockchain/eth/contracts/main/staking_escrow/test_staking_escrow_additional.py

@@ -24,7 +24,7 @@ from web3.contract import Contract
 
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.token import NU
-from tests.utils.solidity import to_bytes32, get_mapping_entry_location, get_array_data_location
+from tests.utils.solidity import get_array_data_location, get_mapping_entry_location, to_bytes32
 
 LOCK_RE_STAKE_UNTIL_PERIOD_FIELD = 4
 

tests/blockchain/eth/contracts/test_contracts_upgradeability.py

@@ -15,15 +15,15 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 import contextlib
-import os
 
+import os
 import pytest
 import requests
 from web3.exceptions import ValidationError
 
-from nucypher.blockchain.eth.deployers import NucypherTokenDeployer, StakingEscrowDeployer, PolicyManagerDeployer, \
-    AdjudicatorDeployer, BaseContractDeployer
-from nucypher.blockchain.eth.interfaces import BlockchainInterfaceFactory, BlockchainDeployerInterface
+from nucypher.blockchain.eth.deployers import AdjudicatorDeployer, BaseContractDeployer, NucypherTokenDeployer, \
+    PolicyManagerDeployer, StakingEscrowDeployer
+from nucypher.blockchain.eth.interfaces import BlockchainDeployerInterface, BlockchainInterfaceFactory
 from nucypher.blockchain.eth.registry import InMemoryContractRegistry
 from nucypher.blockchain.eth.sol.compile import SolidityCompiler, SourceDirs
 from nucypher.crypto.powers import TransactingPower

tests/blockchain/eth/entities/actors/test_deployer.py

@@ -26,7 +26,7 @@ from nucypher.characters.control.emitters import StdoutEmitter
 from nucypher.crypto.powers import TransactingPower
 # Prevents TesterBlockchain to be picked up by py.test as a test class
 from tests.utils.blockchain import TesterBlockchain as _TesterBlockchain
-from tests.utils.constants import NUMBER_OF_ALLOCATIONS_IN_TESTS, INSECURE_DEVELOPMENT_PASSWORD
+from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD, NUMBER_OF_ALLOCATIONS_IN_TESTS
 
 
 @pytest.mark.slow()

tests/blockchain/eth/entities/actors/test_investigator.py

@@ -16,11 +16,10 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import pytest
-
 from umbral.keys import UmbralPrivateKey
 from umbral.signing import Signer
 
-from nucypher.blockchain.eth.actors import Staker, Investigator
+from nucypher.blockchain.eth.actors import Investigator, Staker
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.token import NU
 from nucypher.crypto.signing import SignatureStamp

tests/blockchain/eth/entities/actors/test_multisig_actors.py

@@ -16,13 +16,11 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import pytest
+from unittest.mock import PropertyMock, patch
 
 from nucypher.blockchain.eth.actors import Trustee
 from nucypher.blockchain.eth.agents import MultiSigAgent
 from nucypher.blockchain.eth.deployers import MultiSigDeployer
-from nucypher.blockchain.eth.interfaces import BlockchainInterface
-
-from unittest.mock import PropertyMock, patch
 
 
 @pytest.mark.slow()

tests/blockchain/eth/entities/agents/test_adjudicator_agent.py

@@ -16,7 +16,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import pytest
-
 from umbral.keys import UmbralPrivateKey
 from umbral.signing import Signer
 

tests/blockchain/eth/entities/agents/test_preallocation_escrow_agent.py

@@ -14,9 +14,8 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-import os
-
 import maya
+import os
 import pytest
 from eth_tester.exceptions import TransactionFailed
 from eth_utils import is_checksum_address, to_wei

tests/blockchain/eth/entities/agents/test_sampling_distribution.py

@@ -15,9 +15,10 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import pytest
 from collections import Counter
 
+import pytest
+
 from nucypher.blockchain.economics import BaseEconomics
 from nucypher.blockchain.eth.agents import StakingEscrowAgent
 from nucypher.blockchain.eth.constants import NULL_ADDRESS, STAKING_ESCROW_CONTRACT_NAME

tests/blockchain/eth/entities/agents/test_staking_escrow_agent.py

@@ -16,12 +16,11 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import os
-
 import pytest
 from eth_tester.exceptions import TransactionFailed
-from eth_utils.address import to_checksum_address, is_address
+from eth_utils.address import is_address, to_checksum_address
 
-from nucypher.blockchain.eth.agents import StakingEscrowAgent, ContractAgency
+from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent
 from nucypher.blockchain.eth.constants import NULL_ADDRESS
 from nucypher.blockchain.eth.registry import BaseContractRegistry
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD

tests/blockchain/eth/entities/agents/test_worklock_agent.py

@@ -1,7 +1,7 @@
 import pytest
 from eth_tester.exceptions import TransactionFailed
 
-from nucypher.blockchain.eth.agents import WorkLockAgent, ContractAgency, StakingEscrowAgent
+from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent, WorkLockAgent
 from nucypher.blockchain.eth.interfaces import BlockchainInterface
 
 

tests/blockchain/eth/entities/deployers/conftest.py

@@ -17,11 +17,8 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 import pytest
 
-from nucypher.blockchain.eth.deployers import (NucypherTokenDeployer,
-                                               StakingEscrowDeployer,
-                                               PolicyManagerDeployer,
-                                               AdjudicatorDeployer,
-                                               StakingInterfaceDeployer)
+from nucypher.blockchain.eth.deployers import (AdjudicatorDeployer, NucypherTokenDeployer, PolicyManagerDeployer,
+                                               StakingEscrowDeployer, StakingInterfaceDeployer)
 
 
 @pytest.fixture(scope="module")

tests/blockchain/eth/entities/deployers/test_deploy_idle_network.py

@@ -16,16 +16,13 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import pytest
-from eth_tester.exceptions import TransactionFailed
 from constant_sorrow import constants
+from eth_tester.exceptions import TransactionFailed
 
 from nucypher.blockchain.eth.actors import Staker
-from nucypher.blockchain.eth.agents import NucypherTokenAgent, StakingEscrowAgent, ContractAgency
-from nucypher.blockchain.eth.deployers import (NucypherTokenDeployer,
-                                               StakingEscrowDeployer,
-                                               PolicyManagerDeployer,
-                                               AdjudicatorDeployer,
-                                               BaseContractDeployer)
+from nucypher.blockchain.eth.agents import ContractAgency, NucypherTokenAgent, StakingEscrowAgent
+from nucypher.blockchain.eth.deployers import (AdjudicatorDeployer, BaseContractDeployer, NucypherTokenDeployer,
+                                               PolicyManagerDeployer, StakingEscrowDeployer)
 from nucypher.crypto.powers import TransactingPower
 from tests.utils.blockchain import token_airdrop
 from tests.utils.constants import DEVELOPMENT_TOKEN_AIRDROP_AMOUNT, INSECURE_DEVELOPMENT_PASSWORD

tests/blockchain/eth/entities/deployers/test_deploy_preallocations.py

@@ -15,12 +15,11 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import random
 
 import pytest
 
-from nucypher.blockchain.eth.deployers import PreallocationEscrowDeployer, StakingInterfaceDeployer
+from nucypher.blockchain.eth.deployers import PreallocationEscrowDeployer
 
 
 @pytest.mark.slow()

tests/blockchain/eth/entities/deployers/test_interdeployer_integration.py

@@ -14,19 +14,13 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-import os
 
 import pytest
-from eth_utils import keccak
 from constant_sorrow import constants
 
-from nucypher.blockchain.eth.agents import NucypherTokenAgent, StakingEscrowAgent, AdjudicatorAgent, ContractAgency
-from nucypher.blockchain.eth.deployers import (NucypherTokenDeployer,
-                                               StakingEscrowDeployer,
-                                               PolicyManagerDeployer,
-                                               AdjudicatorDeployer,
-                                               BaseContractDeployer,
-                                               DispatcherDeployer)
+from nucypher.blockchain.eth.agents import AdjudicatorAgent, ContractAgency, NucypherTokenAgent, StakingEscrowAgent
+from nucypher.blockchain.eth.deployers import (AdjudicatorDeployer, BaseContractDeployer, NucypherTokenDeployer,
+                                               PolicyManagerDeployer, StakingEscrowDeployer)
 
 
 @pytest.mark.slow()

tests/blockchain/eth/entities/deployers/test_policy_manager_deployer.py

@@ -15,16 +15,9 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-
-import pytest
-from eth_utils import keccak
-
-from nucypher.blockchain.eth.agents import PolicyManagerAgent, StakingEscrowAgent, ContractAgency
+from nucypher.blockchain.eth.agents import ContractAgency, PolicyManagerAgent, StakingEscrowAgent
 from nucypher.blockchain.eth.constants import POLICY_MANAGER_CONTRACT_NAME
-from nucypher.blockchain.eth.deployers import (
-    PolicyManagerDeployer,
-    DispatcherDeployer
-)
+from nucypher.blockchain.eth.deployers import (DispatcherDeployer, PolicyManagerDeployer)
 
 
 def test_policy_manager_deployment(policy_manager_deployer, staking_escrow_deployer, deployment_progress):

tests/blockchain/eth/entities/deployers/test_preallocation_escrow_deployer.py

@@ -18,16 +18,9 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 
 import pytest
 
-from nucypher.blockchain.eth.deployers import (
-    PreallocationEscrowDeployer,
-    StakingInterfaceDeployer,
-    StakingInterfaceRouterDeployer,
-    NucypherTokenDeployer,
-    StakingEscrowDeployer,
-    PolicyManagerDeployer,
-    AdjudicatorDeployer
-)
-from nucypher.crypto.api import keccak_digest
+from nucypher.blockchain.eth.deployers import (AdjudicatorDeployer, NucypherTokenDeployer, PolicyManagerDeployer,
+                                               PreallocationEscrowDeployer, StakingEscrowDeployer,
+                                               StakingInterfaceDeployer, StakingInterfaceRouterDeployer)
 
 preallocation_escrow_contracts = list()
 NUMBER_OF_PREALLOCATIONS = 50

tests/blockchain/eth/entities/deployers/test_staking_escrow_deployer.py

@@ -15,14 +15,10 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import pytest
 from constant_sorrow.constants import BARE
-from eth_utils import keccak
 
-from nucypher.blockchain.eth.agents import StakingEscrowAgent, ContractAgency
-from nucypher.blockchain.eth.deployers import (StakingEscrowDeployer,
-                                               DispatcherDeployer)
-from nucypher.crypto.api import keccak_digest
+from nucypher.blockchain.eth.agents import ContractAgency, StakingEscrowAgent
+from nucypher.blockchain.eth.deployers import (DispatcherDeployer, StakingEscrowDeployer)
 
 
 def test_staking_escrow_deployment(staking_escrow_deployer, deployment_progress):

tests/blockchain/eth/interfaces/test_chains.py

@@ -14,9 +14,9 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
-import os
-from os.path import dirname, abspath
+from os.path import abspath, dirname
 
+import os
 import pytest
 
 from nucypher.blockchain.eth.interfaces import BlockchainDeployerInterface
@@ -25,13 +25,9 @@ from nucypher.blockchain.eth.sol.compile import SolidityCompiler, SourceDirs
 from nucypher.crypto.powers import TransactingPower
 # Prevents TesterBlockchain to be picked up by py.test as a test class
 from tests.utils.blockchain import TesterBlockchain as _TesterBlockchain
-from tests.utils.constants import (
-    DEVELOPMENT_ETH_AIRDROP_AMOUNT,
-    NUMBER_OF_ETH_TEST_ACCOUNTS,
-    NUMBER_OF_STAKERS_IN_BLOCKCHAIN_TESTS,
-    NUMBER_OF_URSULAS_IN_BLOCKCHAIN_TESTS,
-    INSECURE_DEVELOPMENT_PASSWORD
-)
+from tests.utils.constants import (DEVELOPMENT_ETH_AIRDROP_AMOUNT, INSECURE_DEVELOPMENT_PASSWORD,
+                                   NUMBER_OF_ETH_TEST_ACCOUNTS, NUMBER_OF_STAKERS_IN_BLOCKCHAIN_TESTS,
+                                   NUMBER_OF_URSULAS_IN_BLOCKCHAIN_TESTS)
 
 
 @pytest.fixture()

tests/blockchain/eth/interfaces/test_decorators.py

@@ -15,12 +15,9 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import pytest
 
-from eth_utils import to_checksum_address
-
-from nucypher.blockchain.eth.decorators import validate_checksum_address, InvalidChecksumAddress
+from nucypher.blockchain.eth.decorators import InvalidChecksumAddress, validate_checksum_address
 
 
 def test_validate_checksum_address(get_random_checksum_address):

tests/blockchain/eth/interfaces/test_registry.py

@@ -16,11 +16,12 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import json
+
 import pytest
 
 from nucypher.blockchain.eth.constants import PREALLOCATION_ESCROW_CONTRACT_NAME
 from nucypher.blockchain.eth.interfaces import BaseContractRegistry
-from nucypher.blockchain.eth.registry import LocalContractRegistry, IndividualAllocationRegistry
+from nucypher.blockchain.eth.registry import IndividualAllocationRegistry, LocalContractRegistry
 from tests.utils.constants import TEMPORARY_DOMAIN
 
 

tests/blockchain/eth/interfaces/test_solidity_compiler.py

@@ -14,8 +14,9 @@ GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
+from os.path import abspath, dirname
+
 import os
-from os.path import dirname, abspath
 
 from nucypher.blockchain.eth.deployers import NucypherTokenDeployer
 from nucypher.blockchain.eth.sol.compile import SolidityCompiler, SourceDirs

tests/blockchain/eth/interfaces/test_token_and_stake.py

@@ -1,6 +1,5 @@
-from decimal import InvalidOperation, Decimal
-
 import pytest
+from decimal import Decimal, InvalidOperation
 from web3 import Web3
 
 from nucypher.blockchain.eth.token import NU, Stake

tests/characters/control/blockchain/conftest.py

@@ -1,6 +1,6 @@
-import datetime
 from base64 import b64encode
 
+import datetime
 import maya
 import pytest
 

tests/characters/control/blockchain/test_rpc_control_blockchain.py

@@ -1,10 +1,10 @@
+from base64 import b64encode
+
 import pytest
 
-from base64 import b64encode
-from nucypher.policy.collections import TreasureMap
-from nucypher.crypto.powers import DecryptingPower, SigningPower
-from nucypher.characters.lawful import Ursula
 from nucypher.characters.control.interfaces import AliceInterface, BobInterface, EnricoInterface
+from nucypher.crypto.powers import DecryptingPower, SigningPower
+from nucypher.policy.collections import TreasureMap
 
 
 def get_fields(interface, method_name):

tests/characters/control/blockchain/test_web_control_blockchain.py

@@ -1,7 +1,7 @@
-import datetime
 import json
-from base64 import b64encode, b64decode
+from base64 import b64decode, b64encode
 
+import datetime
 import maya
 import pytest
 from click.testing import CliRunner

tests/characters/control/federated/conftest.py

@@ -1,6 +1,6 @@
-import datetime
 from base64 import b64encode
 
+import datetime
 import maya
 import pytest
 

tests/characters/control/federated/test_web_control_federated.py

@@ -1,7 +1,7 @@
-import datetime
 import json
-from base64 import b64encode, b64decode
+from base64 import b64decode, b64encode
 
+import datetime
 import maya
 import pytest
 from click.testing import CliRunner

tests/characters/test_alice_can_grant_and_revoke.py

@@ -16,17 +16,16 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import datetime
-import os
-
 import maya
+import os
 import pytest
 from umbral.kfrags import KFrag
 
 from nucypher.characters.lawful import Bob, Enrico
 from nucypher.config.characters import AliceConfiguration
 from nucypher.crypto.api import keccak_digest
-from nucypher.crypto.powers import SigningPower, DecryptingPower
-from nucypher.policy.collections import Revocation, PolicyCredential
+from nucypher.crypto.powers import DecryptingPower, SigningPower
+from nucypher.policy.collections import PolicyCredential, Revocation
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD
 from tests.utils.middleware import MockRestMiddleware
 

tests/characters/test_bob_handles_frags.py

@@ -23,10 +23,9 @@ from umbral.cfrags import CapsuleFrag
 from umbral.kfrags import KFrag
 
 from nucypher.crypto.kits import PolicyMessageKit
-from tests.utils.middleware import NodeIsDownMiddleware
 from nucypher.crypto.powers import DecryptingPower
 from tests.utils.constants import TEMPORARY_DOMAIN
-from tests.utils.middleware import MockRestMiddleware
+from tests.utils.middleware import MockRestMiddleware, NodeIsDownMiddleware
 
 
 def test_bob_cannot_follow_the_treasure_map_in_isolation(enacted_federated_policy, federated_bob):

tests/characters/test_bob_joins_policy_and_retrieves.py

@@ -1,21 +1,14 @@
 import datetime
-import os
-
 import maya
+import os
 import pytest
 import time
-
 from constant_sorrow.constants import NO_DECRYPTION_PERFORMED
 from twisted.internet.task import Clock
 
-from nucypher.characters.lawful import Bob, Ursula
-from nucypher.characters.lawful import Enrico
+from nucypher.characters.lawful import Bob, Enrico, Ursula
 from nucypher.policy.collections import TreasureMap
-from tests.utils.constants import (
-    NUMBER_OF_URSULAS_IN_DEVELOPMENT_NETWORK,
-    MOCK_POLICY_DEFAULT_M,
-    TEMPORARY_DOMAIN
-)
+from tests.utils.constants import (MOCK_POLICY_DEFAULT_M, NUMBER_OF_URSULAS_IN_DEVELOPMENT_NETWORK, TEMPORARY_DOMAIN)
 from tests.utils.middleware import MockRestMiddleware
 
 

tests/characters/test_crypto_characters_and_their_powers.py

@@ -23,14 +23,10 @@ from eth_account._utils.transactions import Transaction
 from eth_utils import to_checksum_address
 
 from nucypher.blockchain.eth.signers import Web3Signer
-from nucypher.characters.lawful import Alice, Character, Bob
-from nucypher.characters.lawful import Enrico
+from nucypher.characters.lawful import Alice, Bob, Character, Enrico
 from nucypher.crypto import api
 from nucypher.crypto.api import verify_eip_191
-from nucypher.crypto.powers import (CryptoPower,
-                                    SigningPower,
-                                    NoSigningPower,
-                                    TransactingPower)
+from nucypher.crypto.powers import (CryptoPower, NoSigningPower, SigningPower, TransactingPower)
 from tests.utils.constants import INSECURE_DEVELOPMENT_PASSWORD
 
 """

tests/characters/test_freerider_attacks.py

@@ -16,7 +16,6 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import datetime
-
 import maya
 import pytest