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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Python 3.11 launcher fails with \"Unable to create process\"","articleBody":"# Bug report\r\n\r\nWhen running a `pip.pyz` file with the `py.exe` launcher (itself launched from a Rust program), the command fails with the error:\r\n\r\n```\r\nUnable to create process using 'C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python311\\\"py C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version': The system cannot find the file specified.\r\n```\r\n\r\nUnfortunately, I haven't been able to isolate a fully reproducible test case so far. However, I have set `$env:PYLAUNCHER_DEBUG=1` and the output of the failing command is\r\n\r\n```\r\n❯ pip --version\r\nargv0: py.exe\r\nversion: 3.11.0b5\r\n# Read 4096 bytes from C:\\Users\\Gustav\\.local\\apps\\pip.pyz to find shebang line\r\nShebang: /usr/bin/env python\r\n# Reading from C:\\Users\\Gustav\\AppData\\Local\\py.ini for commands/python\r\n# Did not find file C:\\Users\\Gustav\\AppData\\Local\\py.ini\r\n# Reading from C:\\WINDOWS\\py.ini for commands/python\r\n# Did not find file C:\\WINDOWS\\py.ini\r\n# Treating shebang command 'python' as 'py'\r\nSearchInfo.originalCmdLine: \"py.exe\" C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version\r\nSearchInfo.restOfCmdLine:  C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version\r\nSearchInfo.executablePath: (null)\r\nSearchInfo.scriptFile: C:\\Users\\Gustav\\.local\\apps\\pip.pyz\r\nSearchInfo.executable: \"py\r\nSearchInfo.executableArgs:\r\nSearchInfo.company: (null)\r\nSearchInfo.tag: (empty)\r\nSearchInfo.oldStyleTag: True\r\nSearchInfo.lowPriorityTag: False\r\nSearchInfo.exclude32Bit: False\r\nSearchInfo.only32Bit: False\r\nSearchInfo.allowDefaults: False\r\nSearchInfo.allowExecutableOverride: False\r\nSearchInfo.windowed: False\r\nSearchInfo.list: False\r\nSearchInfo.listPaths: False\r\nSearchInfo.help: False\r\n -V:3.11          C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python311\\python.exe\r\n -V:3.10          C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python310\\python.exe\r\n -V:3.9           C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python39\\python.exe\r\n -V:3.8           C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python38\\python.exe\r\nenv.company: PythonCore\r\nenv.tag: 3.11\r\n# about to run: C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python311\\\"py C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version\r\nUnable to create process using 'C:\\Users\\Gustav\\AppData\\Local\\Programs\\Python\\Python311\\\"py C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version': The system cannot find the file specified.\r\n```\r\n\r\nThe key issue seems to be\r\n\r\n```\r\nSearchInfo.executable: \"py\r\n```\r\n\r\n(note the unbalanced quotes) which appears to be a result of incorrectly parsing the following:\r\n\r\n```\r\nSearchInfo.originalCmdLine: \"py.exe\" C:\\Users\\Gustav\\.local\\apps\\pip.pyz --version\r\n```\r\n\r\nI can create the same debug output using the internal `_winapi.CreateProcess` function:\r\n\r\n```\r\n_winapi.CreateProcess(\"C:/Windows/py.exe\", '\"py.exe\" -0', None, None, 0, 0, None, None, 0)\r\n```\r\n\r\nSo the problem appears to be when the command line passed to `CreateProcess` contains a double quoted but relative filename.\r\n\r\n# Your environment\r\n\r\n- Python and launcher from 3.11.0b5.\r\n- Operating system and architecture: Windows 11, 64-bit.\r\n","author":{"url":"https://github.com/pfmoore","@type":"Person","name":"pfmoore"},"datePublished":"2022-07-26T14:47:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/95285/cpython/issues/95285"}