dotfiles

Public repo for my person dotfiles and config notes.

pyenv and pyenv-virtualenv

Installing with Homebrew

$ brew install pyenv-virtualenv

After installation, you'll still need to add

# Pyenv setup
if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi

to your .bashrc profile (as stated in the caveats). You'll only ever have to do this once.

Using pyenv virtualenv with pyenv

To create a virtualenv for the Python version used with pyenv, run pyenv virtualenv, specifying the Python version you want and the name of the virtualenv directory. For example,

$ pyenv virtualenv 2.7.10 my-virtual-env-2.7.10

will create a virtualenv based on Python 2.7.10 under $(pyenv root)/versions in a folder called my-virtual-env-2.7.10.

Create virtualenv from current version

If there is only one argument given to pyenv virtualenv, the virtualenv will be created with the given name based on the current pyenv Python version.

$ pyenv version
3.4.3 (set by /home/yyuu/.pyenv/version)
$ pyenv virtualenv venv34

List existing virtualenvs

pyenv virtualenvs shows you the list of existing virtualenvs and conda environments.

$ pyenv shell venv34
$ pyenv virtualenvs
  miniconda3-3.9.1 (created from /home/yyuu/.pyenv/versions/miniconda3-3.9.1)
  miniconda3-3.9.1/envs/myenv (created from /home/yyuu/.pyenv/versions/miniconda3-3.9.1)
  2.7.10/envs/my-virtual-env-2.7.10 (created from /home/yyuu/.pyenv/versions/2.7.10)
  3.4.3/envs/venv34 (created from /home/yyuu/.pyenv/versions/3.4.3)
  my-virtual-env-2.7.10 (created from /home/yyuu/.pyenv/versions/2.7.10)
* venv34 (created from /home/yyuu/.pyenv/versions/3.4.3)

There are two entries for each virtualenv, and the shorter one is just a symlink.

Activate virtualenv

Some external tools (e.g. jedi) might require you to activate the virtualenv and conda environments.

If eval "$(pyenv virtualenv-init -)" is configured in your shell, pyenv-virtualenv will automatically activate/deactivate virtualenvs on entering/leaving directories which contain a .python-version file that lists a valid virtual environment. .python-version files denote local Python versions and can be created and deleted with the pyenv local command.

You can also activate and deactivate a pyenv virtualenv manually:

pyenv activate <name>
pyenv deactivate

Delete existing virtualenv

Removing the directories in $(pyenv root)/versions and $(pyenv root)/versions/{version}/envs will delete the virtualenv, or you can run:

pyenv uninstall my-virtual-env

virtualenv and venv

There is a venv module available for CPython 3.3 and newer. It provides an executable module venv which is the successor of virtualenv and distributed by default.

pyenv-virtualenv uses python -m venv if it is available and the virtualenv command is not available.