René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"IDLE is unable to open any `.py` files","articleBody":"With a fresh CPython build (be0c106789322273f1f76d232c768c09880a14bd), IDLE is unable to open any `.py` files.\r\n\r\nTo reproduce:\r\n\r\n1. Create an empty `.py` file with the name `repro.py`\r\n2. Run `python -m idlelib repro.py`\r\n\r\nIDLE still seems able to create new `.py` files and save them; it just can't open pre-existing `.py` files right now.\r\n\r\n## Traceback observed\r\n\r\n```pytb\r\nC:\\Users\\alexw\\coding\\cpython\u003epython -m idlelib repro.py\r\nRunning Debug|x64 interpreter...\r\nTraceback (most recent call last):\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\runpy.py\", line 198, in _run_module_as_main\r\n    return _run_code(code, main_globals, None,\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\runpy.py\", line 88, in _run_code\r\n    exec(code, run_globals)\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\__main__.py\", line 7, in \u003cmodule\u003e\r\n    idlelib.pyshell.main()\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\pyshell.py\", line 1640, in main\r\n    if flist.open(filename) is None:\r\n       ^^^^^^^^^^^^^^^^^^^^\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\filelist.py\", line 37, in open\r\n    edit = self.EditorWindow(self, filename, key)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\pyshell.py\", line 135, in __init__\r\n    EditorWindow.__init__(self, *args)\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\editor.py\", line 289, in __init__\r\n    self.set_indentation_params(is_py_src)\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\editor.py\", line 1327, in set_indentation_params\r\n    i = self.guess_indent()\r\n        ^^^^^^^^^^^^^^^^^^^\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\editor.py\", line 1574, in guess_indent\r\n    opener, indented = IndentSearcher(self.text, self.tabwidth).run()\r\n                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"C:\\Users\\alexw\\coding\\cpython\\Lib\\idlelib\\editor.py\", line 1646, in run\r\n    save_tabsize = tokenize.tabsize\r\n                   ^^^^^^^^^^^^^^^^\r\nAttributeError: module 'tokenize' has no attribute 'tabsize'\r\n```\r\n\r\n## Environment\r\n\r\n(Given the cause of the bug, the environment details shouldn't really be relevant; but they're included here anyway, for completeness.)\r\n\r\n```\r\nPython 3.12.0a7+ (heads/main:be0c106789, May 21 2023, 12:00:27) [MSC v.1932 64 bit (AMD64)] on win32\r\n```\r\n\r\nReproduces on a debug and non-debug build, FWIW.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-104722\n* gh-104726\n* gh-104727\n* gh-104767\n* gh-104844\n* gh-104845\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/AlexWaygood","@type":"Person","name":"AlexWaygood"},"datePublished":"2023-05-21T11:40:41.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":30},"url":"https://github.com/104719/cpython/issues/104719"}