On Wed, Oct 19, 2016 at 6:01 PM, Sayth Renshaw <flebber.c...@gmail.com> wrote: > Ok i think i do understand it. I searched the python document for in-place > functions but couldn't find a specific reference. > > Is there a particular part in docs or blog that covers it? Or is it > fundamental to all so not explicitly treated in one particular page?
It's not a rule, it's a design principle. So the best way to find out about it is either to look at hundreds or thousands of Python standard library functions and recognize a pattern... or ask on a mailing list and be told :) ChrisA -- https://mail.python.org/mailman/listinfo/python-list
