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• You can download, build and install CPython from sources.
• If you are an Ubuntu user, you could add a third-party repository 'Deadsnakes' and install the missing versions via apt. If you install from Deadsnakes, make sure to also install python#.#-dev, python#.#-venv and python#.#-distutils packages.
• You can use PyEnv to download and install Python versions (Recommended).
  Installation steps may look  as follows:
  1. Follow the steps below in How to setup pyenv.

  2. Install Python intepreter for each supported Python minor version. Leaving out the patch version will install the latest.

     Code Block
     language bash
     pyenv install 3.9 pyenv install 3.10 pyenv install 3.11 pyenv install 3.12

     For major.minor.patch versions currently used by Jenkins cluster, see  Current Installations.

  3. Make installed interpreters available in your shell by first running

     Code Block

     language	bash

     pyenv global 3.9 3.10 3.11 3.12

     :

     Code Block
     language bash
     pyenv global 3.9 3.10 3.11 3.12

     
     

  4. (OPTIONAL) Pyenv will sometimes fail to make these interpreters directly available without a local configuration. If you see errors trying to use python3.x , then run also pyenv local  

     Code Block
     language bash
     pyenv local 3.9 3.10 3.11 3.12

     
     

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