Leo works with Python 3.14rc1. Python 3.9 nearing end of life

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Jul 30, 2025, 1:32:49 PMJul 30

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Leo 6.8.6 works with Python 3.14rc1, due October 27, 2025.

To install, run (with Python 3.14rc1, in the leo-editor folder):

pip install -r requirements.txt

Everything should "just work".

Python 3.9 will reach its "end of life" in October 2025.

Leo 6.8.7 is scheduled for November 2025. If that schedule holds, Leo 6.8.6 will be the last version of Leo to support Python 3.9.

If, for whatever reason, you are stuck with Python 3.9, now is the time to upgrade to at least Python 3.10.

Edward

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Jul 30, 2025, 2:06:34 PMJul 30

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On Wednesday, July 30, 2025 at 12:32:49 PM UTC-5 Edward K. Ream wrote:

Leo 6.8.6 works with Python 3.14rc1, due October 27, 2025.

Running all of Leo's tests with Python 3.14 revealed a few minor problems. See #4401.