started work on decorator pattern.

pypatterns/structural/decorator.py

@@ -0,0 +1,31 @@
+from functools import partial
+from abc import ABCMeta, abstractmethod
+
+
+class Decorator(object, metaclass=ABCMeta):
+
+    def __get__(self, instance, owner):
+        return partial(self.__call__, instance)
+
+    @abstractmethod
+    def __call__(self, *args, **kwargs):
+        pass
+
+
+class DecoratorSimple(Decorator, metaclass=ABCMeta):
+
+    def __init__(self, func):
+        self.func = func
+
+
+class DecoratorArgs(Decorator, metaclass=ABCMeta):
+
+    @abstractmethod
+    def __init__(self, *args, **kwargs):
+        pass
+
+
+class Wrap(DecoratorSimple):
+
+    def __call__(self, instance, func, *args, **kwargs):
+        return lambda: self.func(instance, func, *args, **kwargs)