René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Exception using fileinput.hook_compressed in binary mode","articleBody":"\u003c!--\r\n  If you're new to Python and you're not sure whether what you're experiencing is a bug, the CPython issue tracker is not\r\n  the right place to seek help. Consider the following options instead:\r\n\r\n  - reading the Python tutorial: https://docs.python.org/3/tutorial/\r\n  - posting in the \"Users\" category on discuss.python.org: https://discuss.python.org/c/users/7\r\n  - emailing the Python-list mailing list: https://mail.python.org/mailman/listinfo/python-list\r\n  - searching our issue tracker (https://github.com/python/cpython/issues) to see if\r\n    your problem has already been reported\r\n--\u003e\r\n\r\n# Bug report\r\n\r\nWhen using the [`fileinput.hook_compressed`](https://docs.python.org/3/library/fileinput.html#fileinput.hook_compressed) hook in binary mode in the case that the file is *not* compressed, an exception is raised instead of processing the file like normal.\r\n\r\n```python\r\n# fileinput_cat.py\r\n\r\nimport fileinput\r\nimport sys\r\n\r\nwith fileinput.input(mode='rb', openhook=fileinput.hook_compressed) as f:\r\n    for line in f:\r\n        sys.stdout.buffer.write(line)\r\n```\r\n\r\n```console\r\n$ python3.10 fileinput_cat.py fileinput_cat.py\r\nTraceback (most recent call last):\r\n  File \"fileinput_bug.py\", line 5, in \u003cmodule\u003e\r\n    for line in f:\r\n  File \".../lib/python3.10/fileinput.py\", line 256, in __next__\r\n    line = self._readline()\r\n  File \".../lib/python3.10/fileinput.py\", line 385, in _readline\r\n    self._file = self._openhook(self._filename, self._mode)\r\n  File \".../lib/python3.10/fileinput.py\", line 432, in hook_compressed\r\n    return open(filename, mode, encoding=encoding, errors=errors)\r\nValueError: binary mode doesn't take an encoding argument\r\n```\r\n\r\n# Your environment\r\n\r\nI tried this on Python 3.10.9 (installed from nixpkgs) on Intel macOS 11.7.3. It was working on Python 3.9.16.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-102068\n* gh-102098\n* gh-102099\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/gmacon","@type":"Person","name":"gmacon"},"datePublished":"2023-02-16T19:58:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/101961/cpython/issues/101961"}