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omnipy.util.weak

CLASS DESCRIPTION
KeyRef
WeakKeyRefContainer

KeyRef

Bases: list

METHOD DESCRIPTION
__init__
Source code in src/omnipy/util/weak.py 
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class KeyRef(list):
    def __init__(self, obj: object) -> None:
        super().__init__([id(obj)])

    def __hash__(self) -> int:  # type: ignore[override]
        return self[0]

__init__ 

__init__(obj: object) -> None
Source code in src/omnipy/util/weak.py 
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def __init__(self, obj: object) -> None:
    super().__init__([id(obj)])

WeakKeyRefContainer

Bases: Generic[_AnyKeyT, _ValT]

METHOD DESCRIPTION
__init__
clear
get
Source code in src/omnipy/util/weak.py 
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class WeakKeyRefContainer(Generic[_AnyKeyT, _ValT]):
    def __init__(self) -> None:
        self._key_dict: WeakValueDictionary[KeyRef, _AnyKeyT] = WeakValueDictionary()
        self._value_dict: WeakKeyDictionary[KeyRef, _ValT] = WeakKeyDictionary()

    def __contains__(self, key: _AnyKeyT) -> bool:
        return KeyRef(key) in self._value_dict

    def get(self, key: _AnyKeyT) -> _ValT | None:
        key_ref = KeyRef(key)
        if key_ref in self._value_dict:
            return self._value_dict[key_ref]
        else:
            return None

    def __getitem__(self, key: _AnyKeyT) -> _ValT:
        key_ref = KeyRef(key)
        if key_ref in self._value_dict:
            return self._value_dict[key_ref]
        else:
            raise KeyError(f'{key} is not in {self.__class__.__name__}')

    def __setitem__(self, key: _AnyKeyT, value: _ValT) -> None:
        key_ref = KeyRef(key)
        self._key_dict[key_ref] = key
        self._value_dict[key_ref] = value

    def __len__(self) -> int:
        return len(self._value_dict)

    def clear(self) -> None:
        self._key_dict.clear()
        self._value_dict.clear()

__init__ 

__init__() -> None
Source code in src/omnipy/util/weak.py 
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def __init__(self) -> None:
    self._key_dict: WeakValueDictionary[KeyRef, _AnyKeyT] = WeakValueDictionary()
    self._value_dict: WeakKeyDictionary[KeyRef, _ValT] = WeakKeyDictionary()

clear 

clear() -> None
Source code in src/omnipy/util/weak.py 
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def clear(self) -> None:
    self._key_dict.clear()
    self._value_dict.clear()

get 

get(key: _AnyKeyT) -> _ValT | None
Source code in src/omnipy/util/weak.py 
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def get(self, key: _AnyKeyT) -> _ValT | None:
    key_ref = KeyRef(key)
    if key_ref in self._value_dict:
        return self._value_dict[key_ref]
    else:
        return None