24 lines
561 B
Python
24 lines
561 B
Python
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"""Read only dictionary."""
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from typing import Any, TypeVar
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def _readonly(*args: Any, **kwargs: Any) -> Any:
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"""Raise an exception when a read only dict is modified."""
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raise RuntimeError("Cannot modify ReadOnlyDict")
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Key = TypeVar("Key")
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Value = TypeVar("Value")
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class ReadOnlyDict(dict[Key, Value]):
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"""Read only version of dict that is compatible with dict types."""
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__setitem__ = _readonly
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__delitem__ = _readonly
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pop = _readonly
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popitem = _readonly
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clear = _readonly
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update = _readonly
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setdefault = _readonly
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