saving dependency work

lib/python3.9/site-packages/lazy_object_proxy/utils.py

@@ -0,0 +1,60 @@
+from collections.abc import Awaitable
+from inspect import CO_ITERABLE_COROUTINE
+from types import CoroutineType
+from types import GeneratorType
+
+
+async def do_await(obj):
+    return await obj
+
+
+def do_yield_from(gen):
+    return (yield from gen)
+
+
+def await_(obj):
+    obj_type = type(obj)
+    if (
+        obj_type is CoroutineType
+        or obj_type is GeneratorType
+        and bool(obj.gi_code.co_flags & CO_ITERABLE_COROUTINE)
+        or isinstance(obj, Awaitable)
+    ):
+        return do_await(obj).__await__()
+    else:
+        return do_yield_from(obj)
+
+
+def __aiter__(self):
+    return self.__wrapped__.__aiter__()
+
+
+async def __anext__(self):
+    return await self.__wrapped__.__anext__()
+
+
+def __await__(self):
+    return await_(self.__wrapped__)
+
+
+def __aenter__(self):
+    return self.__wrapped__.__aenter__()
+
+
+def __aexit__(self, *args, **kwargs):
+    return self.__wrapped__.__aexit__(*args, **kwargs)
+
+
+def identity(obj):
+    return obj
+
+
+class cached_property(object):
+    def __init__(self, func):
+        self.func = func
+
+    def __get__(self, obj, cls):
+        if obj is None:
+            return self
+        value = obj.__dict__[self.func.__name__] = self.func(obj)
+        return value