How to port Python 2 Code to Python 3

作者:

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 PEP 373 and status of Python versions.

If you are looking to port an extension module instead of pure Python code, please see 遷移延伸模組到 Python 3.

The archived python-porting mailing list may contain some useful guidance.

Since Python 3.13 the original porting guide was discontinued. You can find the old guide in the archive.

Third-party guides

There are also multiple third-party guides that might be useful:

• Guide by Fedora

• PyCon 2020 tutorial

• Guide by DigitalOcean

• Guide by ActiveState