On Mon, Jun 24, 2019 at 4:03 AM James Lu <jam...@gmail.com> wrote: > > If a function that tends to return a context manager returns None, that > should not mean an error occurred. If an error or unexpected condition > occurred, an exception should be thrown. Errors and exceptions should result > in the code within the with statement not executing. > > We could add a new constant to Python, “Dont.” It’s a global falsey Singleton > and a context manager that causes the code inside “with” not to execute. >
A cleaner way to handle this would be an exception. Unfortunately, the simple trick of suppressing the exception in __exit__ doesn't work, as __exit__ isn't called if __enter__ itself fails. Maybe you can use ExitStack to manage this? ChrisA _______________________________________________ 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/IOG5IH6QWKAEABUCPTLZHV7GDB424UM5/ Code of Conduct: http://python.org/psf/codeofconduct/
