Install Pyenv using package managers like Homebrew on macOS or Git for other systems. Follow platform-specific instructions to set it up.
Add Pyenv to your shell by updating .bashrc, .zshrc, or equivalent. This ensures Pyenv works every time you open a terminal.
Use pyenv install <version> to install specific Python versions. Check available versions with pyenv install --list.
Use pyenv global <version> to set a global default or pyenv local <version> for project-specific settings.
Switch between Python versions quickly using pyenv shell <version>. It overrides global and local settings for the session.
Ensure dependencies like build-essential are installed on Linux. Run pyenv doctor to diagnose and fix issues.