Manage Python Develop Environment with Pyenv and Vitualenv
What are Pyenv and Vitualenv?
pyenv is a simple python version management tool. pyenv lets you easily switch between multiple versions of Python.
Vitualenv is a tool to create isolated Python environments.
Install Pyenv
1. Install curl and git
sudo apt-get install curl git-core
2. Install pyenv
curl -L https://raw.github.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash
pyenv will be installed in ~/.pyenv
3. Add codes to ~/.bashrc
export PYENV_ROOT="${HOME}/.pyenv"
if [ -d "${PYENV_ROOT}" ]; then
export PATH="${PYENV_ROOT}/bin:${PATH}"
eval "$(pyenv init -)"
fiAbove codes set pyenv location, so terminal can execute pyenv commands.
4. Make .bashrc effect
source ~/.bashrc
Install Python with Pyenv
1. check available versions of python
pyenv install –list
2. Install python 2 and python 3
pyenv install 2.7.11pyenv install 3.4.4
3. Check installed python
pyenv versions
Output:
* system (set by /home/jack/.pyenv/version) 2.7.11 3.4.4
Switch python versions
pyenv global 3.4.4pyenv global system
Uninstall python
pyenv uninstall x.x.x
Create Virtual Python Environment with virtualenv
Pyenv has installed the vitrualenv plugin, so we need not install vitrualenv again.
1. Create a vitrual environment of python 3
pyenv virtualenv 3.4.4 env3
Above command creates a python virtual environment named env3. env3 is located at ~/.pyenv/versions/.
Command ‘pyenv versions’ could display current virtual environment:
* system (set by /home/jack/.pyenv/version) 2.7.11 3.4.4
env3
Switch Virtual Environment
Switch to env3
pyenv activate env3
Now you can do anything in env3 and won’t effect system and other virtual environments.
Switch back to system environment
pyenv deactivate
Delete a virtual environment
rm -rf ~/.pyenv/versions/env3/
