René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Differentiate `sys.implementation.version` from `sys.version_info`","articleBody":"## Feature\n\nI'm writing an application that runs a third-party script, which operates on pickles generated by another application. There are different versions of the script for Python 2 and Python 3, and the Python version must match the Python version used by that other application, but the actual implementation doesn't matter -- CPy, RustPy, Jython, IronPy, and PyPy all work properly.\n\nMy application allows the user to choose their Python executable of choice. It needs to check whether it implements Python 2 or Python 3 and also collect and show a proof-of-life (i.e. \"RustPython 0.5.0 (64bit, for Python 3.14)\"). Usually I'd get that from PEP514 registrations, but I also need to generate it if someone browses to an unregistered interpreter like RustPython. I'm getting incorrect output from RustPython when I try to obtain that information.\n\nThere are two version numbers in `sys`, and RustPython incorrectly uses the same version information in both:\n* `sys.version_info` -- This is the version of CPython that RustPython is trying to copy, and is correctly set to (essentially) `3.14.0alpha`.\n* `sys.implementation.version` -- This is the version of RustPython itself. It should be set to (essentially) `0.5.0`, but instead is set to the same version as above.\n\n## Python Documentation or reference to CPython source code\nhttps://docs.python.org/3/library/sys.html#sys.implementation\n\n","author":{"url":"https://github.com/TwelveBaud","@type":"Person","name":"TwelveBaud"},"datePublished":"2026-05-03T20:47:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/7770/RustPython/issues/7770"}