Something about Pyenv On MacOS

Pyenv.md

Something about Pyenv On MacOS

How to install pyenv

Installing pyenv

#Via homebrew
brew update
brew install pyenv

Setting the ENV

Bash

If you using Bash, and adding the following lines to the end of ~/.bash_profile

export PATH="$HOME/.pyenv/bin:$PATH"

if command -v pyenv 1>/dev/null 2>&1; then
  eval "$(pyenv init -)"
fi

Then source the file to call the exports

source ~/.bash_profile

ZSH

If you using ZSH with oh-my-zsh, adding the pyenv plugin to the plugins array in ~/.zshrc.

plugins=(
  pyenv
)

Then source to activate the changes.

source ~/.zshrc

Using pyenv

#Check pyenv version
pyenv --version

#Check commands
pyenv --help

#List all available version of python
pyenv install -l

#Install the latest stable version
pyenv install 3.8.5

#List all version was installed
pyenv versions

* system
  2.7.18 (set by /Users/stana/.pyenv/version)
  3.7.8
  3.8.5

#Setting 3.7.8 as the default interpreter
pyenv global 3.7.8

#And verify the version we are using
python --version

The special version string system will use your default system Python. Run pyenv versions for a list of available Python versions.

Example: To enable the python2.7 and python3.7 shims to find their respective executables you could set both versions with:

pyenv global 2.7.18 3.7.8

#And verify the version we are using
python --version
#Python 2.7.18
python3 --version
#Python 3.8.5

The usage of these three commands(pyenv shell | local | global) is a bit similar, here is one of them for illustration.

# Display version
pyenv local

# Setting version
pyenv local 2.7.18 3.7.8

# Unset version
pyenv local --unset