Gerald Britton <gerald.brit...@gmail.com> wrote: > >>> x = f() > >>> hasattr(x, '__enter__') > True > >>> with f() as x: > hasattr(x,'__enter__') > True > > As you can see, the object has a '__enter__' method regardless of how > it was created. Whatever the test, it needs to return False in the > first case and True in the second case, without modifying the class > definition.
If you control all instantiation and this is to simplify code further on, could you have a ContextF that's a child of F? The only difference would then be the protocol methods. A use case could also help here. -- http://mail.python.org/mailman/listinfo/python-list
