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
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