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Python 3.9 + Ubuntu 22.04: Needs deadsnakes PPA; Default Is Python 3.10

Python 3.9 + Ubuntu 22.04 LTS

Ubuntu 22.04 defaults to Python 3.10. Python 3.9 requires the deadsnakes PPA. Running an older Python version than the OS default is unusual and usually indicates a pinned requirement. Python 3.9 reaches EOL in October 2025. pyenv provides cleaner per-project isolation than system PPA packages.

Workarounds & Fixes

deadsnakes: `sudo add-apt-repository ppa:deadsnakes/ppa && sudo apt install python3.9 python3.9-venv`
pyenv for cleaner version pinning: `pyenv install 3.9`

Related Error Pages

Fix: python modulenotfounderror

Related Combinations

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Last verified: 2024-06-01 · Category: Python + OS