`NamedTemporaryFile` / `mkstemp` appear to allow `Path` for `dir=` parameter though undocumented

[asottile]

>>> from pathlib import Path
>>> d = Path('/tmp/wat')
>>> d.mkdir(exist_ok=True, parents=True)
>>> import tempfile
>>> with tempfile.NamedTemporaryFile(dir=d) as f:
...     print(f.name)
... 
/tmp/wat/tmp68qwo9yy

[srittau]

Looking at the source, NamedTemporaryFile calls mkstemp(), which calls os.path.join(), os.path.isdir(), and os.access, which are all path-safe, starting with Python 3.6. Patches welcome.

[asottile]

I've created a bpo issue to document / test this since this appears untested and I wouldn't want it to regress: https://bugs.python.org/issue35803

[asottile]

here's the cpython PR: python/cpython#11644