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How to install pyenv and Python on Ubuntu (including WSL2)

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ひかり
ひかり
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Install Dependencies​

Reference: Home · pyenv/pyenv Wiki

sudo apt update
sudo apt install build-essential libssl-dev zlib1g-dev \
   libbz2-dev libreadline-dev libsqlite3-dev curl \
   libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev lbmzma-dev

Install pyenv​

Reference: [pyenv/pyenv-installer: This tool is used to install pyenv and friends.] (https://github.com/pyenv/pyenv-installer?tab=readme-ov-file)

curl https://pyenv.run | bash

Add initialization script to ~/.bashrc​

# Open ~/.bashrc
code ~/.bashrc

Add the following:

export PYENV_ROOT="$HOME/.pyenv"
[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"

eval "$(pyenv virtualenv-init -)"

Install Python​

Display a list of installable versions​

pyenv install -l

Install Python​

Install Python 3.12.2.

pyenv install 3.12.2

Set the Python version​

Set the default version to Python 3.12.2.

pyenv global 3.12.2

python -V # Python 3.12.2