`zipfile.ZipFile.writestr()` raises `AttributeError` instead of accepting `os.PathLike` objects (e.g. `pathlib.Path`)

Bug report

Bug description:

Unlike ZipFile.write() (which accepts os.PathLike objects such as pathlib.Path for both its filename and arcname arguments), ZipFile.writestr() fails when passed a PathLike object as its zinfo_or_arcname parameter.

Instead of converting it to a string using os.fspath() (as expected by modern standard library conventions), it attempts to call .find(chr(0)) directly on the path object, resulting in an immediate AttributeError.

Repro:

import zipfile
import pathlib
import io
z = zipfile.ZipFile(io.BytesIO(), 'w')
# Passes a pathlib.Path instead of a raw string
z.writestr(pathlib.Path('foo.txt'), b'hello')

Traceback:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".../zipfile/__init__.py", line 2020, in writestr
    zinfo = ZipInfo(zinfo_or_arcname)._for_archive(self)
            ^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../zipfile/__init__.py", line 455, in __init__
    filename = _sanitize_filename(filename)
  File ".../zipfile/__init__.py", line 410, in _sanitize_filename
    null_byte = filename.find(chr(0))
                ^^^^^^^^^^^^^
AttributeError: 'PosixPath' object has no attribute 'find'

CPython versions tested on:

3.14

Operating systems tested on:

macOS

Commencez dans zipfile/init.py, au niveau de ZipFile.writestr(), ZipInfo.init() et _sanitize_filename(), puis exécutez la reproduction avec pathlib.Path du issue. Le travail est terminé lorsque writestr() accepte les objets os.PathLike tels que pathlib.Path sans lever d’AttributeError, tout en conservant le comportement existant pour les chaînes de caractères.