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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"str(zipfile.Path()) not working when root attribute is io.BytesIO","articleBody":"Using `zipfile.Path` with a ZIP-file \"in memory\" as `io.BytesIO` instance. In that case attributes like `.filename()` or `.__str__()` do not work because they try to instanciate a `pathlib.Path()` with a `io.BytesIO` object.\r\n\r\nI can confirm this with Python 3.11 (run in Docker), Python 3.10.2 (Windows) and Python 3.9.2 (Debian stable). See output below for detailed version infos.\r\n\r\n# Code to reproduce\r\n\r\n```python \r\n#!/usr/bin/env python3\r\nimport sys\r\nimport io\r\nimport pathlib\r\nimport zipfile\r\n\r\nprint('{} {}\\n'.format(sys.platform, sys.version))\r\n\r\nzip_bytes = io.BytesIO()\r\n\r\n# create a zipfile in memory\r\nwith zipfile.ZipFile(zip_bytes, 'w') as zf:\r\n    zf.writestr('entry.file', 'content')\r\n\r\n# ZIP-Path object from in-memory-ZIP\r\nmy_zip_path = zipfile.Path(zip_bytes, 'entry.file')\r\nprint('Exists {}'.format(my_zip_path.exists()))\r\n\r\n# here comes the Exception\r\nprint(my_zip_path)\r\n```\r\n\r\n# Output: Python 3.11 on Linux/Docker\r\n\r\n```\r\nDigest: sha256:250990a809a15bb6a3e307fec72dead200c882c940523fb1694baa78eb0e47c6\r\nStatus: Downloaded newer image for python:3.11\r\nPython 3.11.1 (main, Dec 21 2022, 18:32:57) [GCC 10.2.1 20210110] on linux\r\n......\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  File \"/usr/local/lib/python3.11/zipfile.py\", line 2421, in filename\r\n    return pathlib.Path(self.root.filename).joinpath(self.at)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/local/lib/python3.11/pathlib.py\", line 871, in __new__\r\n    self = cls._from_parts(args)\r\n           ^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/local/lib/python3.11/pathlib.py\", line 509, in _from_parts\r\n    drv, root, parts = self._parse_args(args)\r\n                       ^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/local/lib/python3.11/pathlib.py\", line 493, in _parse_args\r\n    a = os.fspath(a)\r\n        ^^^^^^^^^^^^\r\nTypeError: expected str, bytes or os.PathLike object, not NoneType\r\n\r\n```\r\n\r\n# Output: Python 3.10 on Windows\r\n\r\n```\r\nwin32 3.10.2 (tags/v3.10.2:a58ebcc, Jan 17 2022, 14:12:15) [MSC v.1929 64 bit (AMD64)]\r\n\r\nExists True\r\nTraceback (most recent call last):\r\n  File \"C:\\Users\\buhtzch\\ownCloud\\my.work\\buhtzology\\zippathbug.py\", line 28, in \u003cmodule\u003e\r\n    print(my_zip_path)\r\n  File \"C:\\Program Files\\Python310\\lib\\zipfile.py\", line 2380, in __str__\r\n    return posixpath.join(self.root.filename, self.at)\r\n  File \"C:\\Program Files\\Python310\\lib\\posixpath.py\", line 76, in join\r\n    a = os.fspath(a)\r\nTypeError: expected str, bytes or os.PathLike object, not NoneType\r\n```\r\n\r\n# Output: Python 3.9.2 on Debian stable (11)\r\n\r\n```\r\nlinux 3.9.2 (default, Feb 28 2021, 17:03:44)\r\n[GCC 10.2.1 20210110]\r\n\r\nExists True\r\nTraceback (most recent call last):\r\n  File \"/home/user/ownCloud/my.work/buhtzology/zippathbug.py\", line 28, in \u003cmodule\u003e\r\n    print(my_zip_path)\r\n  File \"/usr/lib/python3.9/zipfile.py\", line 2347, in __str__\r\n    return posixpath.join(self.root.filename, self.at)\r\n  File \"/usr/lib/python3.9/posixpath.py\", line 76, in join\r\n    a = os.fspath(a)\r\nTypeError: expected str, bytes or os.PathLike object, not NoneType\r\n```","author":{"url":"https://github.com/buhtz","@type":"Person","name":"buhtz"},"datePublished":"2022-12-29T21:51:55.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/100609/cpython/issues/100609"}