On Wed, Jan 30, 2019 at 11:24 AM Eric V. Smith <e...@trueblade.com> wrote: > Your examples show literals, but I literally (heh) never use str.join > this way. I always pass it some variable. And 100% of the time, if that > variable (say it's a list) contains something that's not a string, I > want it to raise an exception. I do not want this to succeed: > > lst = ['hello', None] > ', '.join(lst) > > lst is usually computed a long way from where the join happens. > > So, I do not want this task automated for me.
That's a really good point ! So, maybe we have a parameter for that ... from implode import implode assert implode('-', [3, None, 2], none_str='') == '3-2' Even that still seems pretty fuzzy to me, please, can you share an idea for improvement ? -- ∞ _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/