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How to port Python 2 Code to Python 3 — Python 3.13.5 documentation

https://docs.python.org/3/howto/pyporting.html

“author, Brett Cannon,. Python 2 reached its official end-of-life at the start of 2020. This means that no new bug reports, fixes, or changes will be made to Python 2 - it’s no longer supported: see...” (the page’s own description)

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Last read: 7 Jul 2025
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https://github.com/stackless-dev/stackless “Porting HOWTO”
https://cloud.google.com/dataflow/docs/release-notes “compatible with Python 3”
https://python.org/doc “Porting Python 2 Code to Python 3”
https://docs.python.org/3/howto/pyporting.html “How to port Python 2 Code to Python 3”
https://github.com/larryhastings/co_annotations “Porting HOWTO”
https://github.com/graalvm/graalpython “the official guide from the Python community”
http://www.python.org/doc/ “Porting Python 2 Code to Python 3”
https://www.python.org/doc/sunset-python-2/ “the official "Porting Python 2 Code to Python 3" guide”
https://python3statement.org/ “How to add Python 3 support to your code”

Sites: cloud.google.com, docs.python.org, github.com, python3statement.org, python.org, www.python.org

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