On Fri, Dec 13, 2019 at 06:27:41PM -0500, Wes Turner wrote:
> Would the builtins import look like this:
>
> if not hasattr(__builtins__, 'first'):
Not that.
`__builtins__` is a private CPython implementation detail, so the above
is always wrong in user code. Better:
import builtins
try:
builtins.first
except AttributeError:
...
You don't even need the builtins import:
try:
first
except AttributeError:
...
Remember how we say "not every one-liner needs to be a builtin"? Why is
this trivial one-line wrapper around next important enough to be a
builtin?
> import sys
> if sys.version_info[:2] < (3,9):
> from more_itertools.more import first
Feature detection is better and more reliable than version checks.
--
Steven
_______________________________________________
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/LQKCZTS3MVJTAOAX3PI2HQH3EJY67W3M/
Code of Conduct: http://python.org/psf/codeofconduct/
