Import collections abstract base classes from collections.abc (#15649)

Accessing them directly through collections is deprecated since 3.7, and
will no longer work in 3.8.

homeassistant/components/google_assistant/smart_home.py

@@ -1,5 +1,5 @@
 """Support for Google Assistant Smart Home API."""
-import collections
+from collections.abc import Mapping
 from itertools import product
 import logging
 
@@ -50,7 +50,7 @@ DOMAIN_TO_GOOGLE_TYPES = {
 def deep_update(target, source):
     """Update a nested dictionary with another nested dictionary."""
     for key, value in source.items():
-        if isinstance(value, collections.Mapping):
+        if isinstance(value, Mapping):
             target[key] = deep_update(target.get(key, {}), value)
         else:
             target[key] = value

homeassistant/components/notify/group.py

@@ -5,7 +5,7 @@ For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/notify.group/
 """
 import asyncio
-import collections
+from collections.abc import Mapping
 from copy import deepcopy
 import logging
 import voluptuous as vol
@@ -33,7 +33,7 @@ def update(input_dict, update_source):
     Async friendly.
     """
     for key, val in update_source.items():
-        if isinstance(val, collections.Mapping):
+        if isinstance(val, Mapping):
             recurse = update(input_dict.get(key, {}), val)
             input_dict[key] = recurse
         else: