On Dec 14, 9:01 pm, Steven D'Aprano <steve +comp.lang.pyt...@pearwood.info> wrote: > [...] > So what are methods? In Python, methods are wrappers around functions > which automatically pass the instance to the inner function object. Under > normal circumstances, you create methods by declaring functions inside a > class, but that's not the only way to create methods, and it is not the > only place they can be found. >
I've always understood methods as basically function wrappers that pass in the instance, so it's good to hear somebody else formulate it that way. For the special methods like __enter__ and __exit__, the tricky part isn't understanding what would happen once the methods were called; the tricky part is getting them to be called in the first place, if they were not declared inside the class or attached to the class. import types class Blank: pass foo = Blank() foo.name = "foo1" foo.__exit__ = types.MethodType(lambda self, *args: print(self.name), foo) foo.__exit__() # works like a method in python3, prints foo1 with foo: pass -- http://mail.python.org/mailman/listinfo/python-list
