On Wed, Mar 7, 2018 at 1:48 AM, Kirill Balunov <kirillbalu...@gmail.com> wrote: > Note: For some historical reasons as the first argument you can use None > instead of function, in this case the identity function is assumed. That > is, all elements of iterable that are false are removed which is equivalent > to (item for item in iterable if item). Currently, for the same purpose the > preferred form is `filter(bool, iterable)`. >
I'd prefer to word it something like: If the first argument is None, the identity function is assumed. That is, all elements of the iterable that are false are removed; it is equivalent to (item for item in iterable if item). It is approximately equivalent to (but faster than) filter(bool, iterable). ChrisA -- https://mail.python.org/mailman/listinfo/python-list
