On Wed, May 26, 2021 at 12:53:32PM -0000, Shreyan Avigyan wrote: > I've already given one. Since Python is dynamically typed changing a critical > variable can cause huge instability. Want a demonstration? Here we go, > > import sys > sys.stdout = None > > Now what? Now how can we print anything? Isn't this a bug?
Assigning to None is probably a TypeError, because None doesn't implement the file object interface. But assigning to a file is perfectly correct. stdout, stdin and stderr are designed to be assigned to. That's why the sys module defines `sys.__stdout__` etc, so you can easily restore them to the originals. You should also note that there are many circumstances where sys.stdout etc are all set to None. See the documentation. https://docs.python.org/3/library/sys.html#sys.__stdin__ -- Steve _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/2BNQFPWLNBF37XXCU6RYCA5Q7PWZQEXT/ Code of Conduct: http://python.org/psf/codeofconduct/
