8th day of python challenges 111-117

venv/lib/python3.6/site-packages/lazy_object_proxy/utils.py

@@ -0,0 +1,13 @@
+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