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.CondaPkg/env/lib/python3.11/site-packages/jsons/_cache.py

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+"""
+PRIVATE MODULE: do not import (from) it directly.
+
+This module contains functionality for caching functions.
+"""
+from collections import deque
+from functools import lru_cache, update_wrapper
+from typing import Callable
+
+
+class _Wrapper:
+    """
+    A wrapper around a function that needs to be cached. This wrapper allows
+    for a single point from which cache can be cleared.
+    """
+    instances = deque([])
+
+    def __init__(self, wrapped):
+        self.wrapped = wrapped
+        self.instances.append(self)
+
+    @lru_cache(typed=True)
+    def __call__(self, *args, **kwargs):
+        return self.wrapped(*args, **kwargs)
+
+
+def cached(decorated: Callable):
+    """
+    Alternative for ``functools.lru_cache``. By decorating a function with
+    ``cached``, you can clear the cache of that function by calling
+    ``clear()``.
+    :param decorated: the decorated function.
+    :return: a wrapped function.
+    """
+    wrapper = _Wrapper(decorated)
+    update_wrapper(wrapper=wrapper, wrapped=decorated)
+    return wrapper
+
+
+def clear():
+    """
+    Clear all cache of functions that were cached using ``cached``.
+    :return: None.
+    """
+    for w in _Wrapper.instances:
+        w.__call__.cache_clear()