On Wed, Nov 28, 2018 at 4:38 AM Ivo Shipkaliev <ivo.shipkal...@gmail.com> wrote: > > Hello. > Maybe it's too late for a discussion, but I just couldn't resist. > I just found out about this new ":=" operator. I need to ask: > > What is the need for this additional ":" to the "="? > Why: > if (match := pattern.search(data)) is not None: > # Do something with match > > What is wrong with: > if match = pattern.search(data) is not None: > # Do something with match > > Assignment expression or assignment statement, it's an assignment, > right? It is very clear to everyone that it's an assignment! Can't it all > just be a "="? > Thank you very much!
It's a bug magnet. https://www.python.org/dev/peps/pep-0572/#why-not-just-turn-existing-assignment-into-an-expression ChrisA -- https://mail.python.org/mailman/listinfo/python-list
