On Mon, 2 Oct 2017 07:51 pm, Marko Rauhamaa wrote: > Chris Angelico <ros...@gmail.com>: > >> On Mon, Oct 2, 2017 at 5:34 PM, Marko Rauhamaa <ma...@pacujo.net> wrote: >>> I have *seen* a semi-useful decorator in code once >>> (@contextlib.contextmanager) but still would prefer explicit dunder >>> methods. >> >> [...] I'm not sure where dunder methods come into this, though, as >> they're completely unrelated. > > A context manager must implement __enter__() and __exit__(). > @contextlib.contextmanager implements them for you.
Nobody is holding a gun to your head and forcing you to use @contextmanager. Its a convenience, nothing more. You can still write your own __enter__ and __exit__ methods if you prefer. -- Steve “Cheer up,” they said, “things could be worse.” So I cheered up, and sure enough, things got worse. -- https://mail.python.org/mailman/listinfo/python-list
