PYENV Introduction--debian/ubuntu Managing multiple versions of Python

PYENV Introduction--debian/ubuntu Managing multiple versions of Python

may ST, 9:00am | COMMENTS

Pyenv is a tool for managing Python versions, and it supports switching between multiple Python versions.

First, install the pyenv

1	git clone https://github.com/yyuu/pyenv.git ~/.pyenv

Add PYENV_ROOT and pyenv init join Bash's ~/.BASHRC (or Zsh's ~/.ZSHRC)

123	echo ‘export PATH=~/.pyenv/bin:$PATH‘ >> ~/.bashrcecho ‘export PYENV_ROOT=~/.pyenv‘ >> ~/.bashrcecho ‘eval "$(pyenv init -)"‘ >> ~/.bashrc

Second, the pyenv Common command list can be installed Python version

1	pyenv install -l

In addition to the official Python version, it also supports

• Anaconda
• IronPython
• Jython
• Miniconda
• PyPy
• Stackless

Install the specified version of Python

12	pyenv install 3.5.1pyenv rehash

It will automatically download and compile the specified version of the Python source code, which requires a system installation:

1	sudo apt-get install -y build-essential zlib1g-dev libssl-dev

You can also choose to install:

1	sudo apt-get install libsqlite3-dev libbz2-dev libreadline-dev

After the installation is complete:

• The source code (such as ~/python-3.5.1.tar.gz) is cached in the. Pyenv/cache directory and can be deleted manually after installation.
• The Python version is installed in the ~/.pyenv/versions directory.

Uninstalling the specified version of Python

1	pyenv unstall 3.5.1

Set the Python version of the shell

1	pyenv shell 3.5.1

Equivalent to

1	export PYENV_VERSION=3.5.1

ClearPYENV_VERSION

1	pyenv shell --unset

Third, installation pyenv-virtualenv

Pyenv-virtual is a pyenv plug-in that supports managing multiple virtualenv

12	git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenvecho ‘eval "$(pyenv virtualenv-init -)"‘ >> ~/.bash_profile

Create Virtualenv

1	pyenv virtualenv 3.5.1 aiohttp-virtual-env

• Before you create a aiohttp-virtual-env, you must install the Python 3.5.1 (installed through the system or pyenv).
• Aiohttp-virtual-env is stored in the ~/.pyenv/versions/3.5.1/envs directory, and a symbolic link with the same name is established in the ~/.pyenv/versions directory.

Delete Virtualenv

1	pyenv uninstall aiohttp-virtual-env

List virtualenv

1	pyenv virtualenvs

Activating/Disabling Virtualenv

12	pyenv activate aiohttp-virtual-envpyenv deactivate

PYENV Introduction--debian/ubuntu Managing multiple versions of Python