Chris Angelico added the comment: The remaining difference that's actually of use, perhaps. But the decoration itself happens before the name is bound. It's impossible to describe in Python code; but it can be probed - you can monkeypatch a class using a decorator:
def monkeypatch(cls): orig = globals()[cls.__name__] # Undocumented magic print("Monkeypatch",id(cls),"into",id(orig)) for attr in dir(cls): if not attr.startswith("_"): setattr(orig,attr,getattr(cls,attr)) return orig class Foo: def method1(self): print("I am method 1") print("Foo is currently",id(Foo)) some_object = Foo() @monkeypatch class Foo: def method2(self): print("I am method 2") print("Foo is now",id(Foo)) some_object.method1() some_object.method2() Is this undocumented behaviour? Should it be supported? It works on every Python I've tried it on (CPython 2.7 and 3.6, PyPy2 and PyPy3, Jython, and MicroPython), but it's not something I'd depend on in production code unless it's documented. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26576> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com