mirror of
https://github.com/RGBCube/GitHubWrapper
synced 2025-05-19 07:25:09 +00:00
71 lines
No EOL
2.1 KiB
Python
71 lines
No EOL
2.1 KiB
Python
#== cache.py ==#
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from __future__ import annotations
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from collections import deque
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from collections.abc import MutableMapping
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from typing import Any, Deque, Tuple, TypeVar
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__all__: Tuple[str, ...] = (
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'ObjectCache',
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)
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K = TypeVar('K')
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V = TypeVar('V')
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class _BaseCache(MutableMapping[K, V]):
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"""This is a rough implementation of an LRU Cache using a deque and a dict."""
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__slots__: Tuple[str, ...] = ('_max_size', '_lru_keys')
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def __init__(self, max_size: int, *args: Any) -> None:
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self._max_size: int = max(min(max_size, 15), 0) # bounding max_size to 15 for now
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self._lru_keys: Deque[K] = deque[K](maxlen=self._max_size)
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super().__init__(*args)
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def __getitem__(self, __k: K) -> V:
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index = self._lru_keys.index(__k)
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target = self._lru_keys[index]
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del self._lru_keys[index]
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self._lru_keys.appendleft(target)
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return super().__getitem__(__k)
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def __setitem__(self, __k: K, __v: V) -> None:
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if len(self) == self._max_size:
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self.__delitem__(self._lru_keys.pop())
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self._lru_keys.appendleft(__k)
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return super().__setitem__(__k, __v)
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def update(self, **kwargs: Any) -> None:
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for key, value in dict(**kwargs).items():
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key: K
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value: V
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self.__setitem__(key, value)
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class ObjectCache(_BaseCache[K, V]):
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"""This adjusts the typehints to reflect Github objects."""
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def __getitem__(self, __k: K) -> V:
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index = self._lru_keys.index(__k)
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target = self._lru_keys[index]
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self._lru_keys.appendleft(target)
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return super().__getitem__(__k)
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def __setitem__(self, __k: K, __v: V) -> None:
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if self.__len__() == self._max_size:
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self.__delitem__(self._lru_keys.pop())
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self._lru_keys.appendleft(__k)
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return super().__setitem__(__k, __v)
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def update(self, **kwargs: Any) -> None:
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for key, value in dict(**kwargs).items():
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key: K
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value: V
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self.__setitem__(key, value) |