Python ====== Enables local Python and local Python package installation. Settings -------- This module supports virtual environments from conda and virtualenvwrapper. By default, only virtualenvwrapper is enabled. To disable virtualenvwrapper, add the following to *zpreztorc*. ```sh zstyle ':prezto:module:python' skip-virtualenvwrapper-init 'on' ``` Conda support is enabled by adding the following to *zpreztorc*. ```sh zstyle ':prezto:module:python' conda-init 'on' ``` Caution: using conda and virtualenvwrapper at the same time may cause conflicts. Local Python Installation ------------------------- [pyenv][4] builds and installs multiple Python versions locally in the home directory. This module prepends the pyenv directory to the path variable to enable the execution of `pyenv`. ### Usage Install Python versions with `pyenv install` into `~/.pyenv/versions`. This will be loaded automatically if pyenv is installed to `$PYENV_ROOT`, `~/.pyenv`, or if the `pyenv` command is on the path. Local Package Installation -------------------------- Since version 2.6, Python supports per user package installation, as defined in [PEP 370][1]. This module prepends per user site directories to the relevant path variables to enable the execution of user installed scripts and the reading of documentation. ### Usage Install packages into the per user site directory with `pip install --user`. virtualenvwrapper ----------------- [`virtualenvwrapper`][2] is a frontend to the popular [`virtualenv`][3] utility. `virtualenv` creates isolated Python environments and `virtualenvwrapper` provides convenient shell functions to create, switch, and manage them. ### Usage Install `virtualenvwrapper`. Virtual environments are stored in `~/.virtualenvs`. There are configuration variables that have to be set to enable certain features. If you wish to use these features, export the variables in [`zshenv`][6]. The variable `$PROJECT_HOME` tells `virtualenvwrapper` where to place project working directories. It must be set and the directory created before `mkproject` is used. Replace *Developer* with your projects directory. ```sh export PROJECT_HOME="$HOME/Developer" ``` The variable `VIRTUALENVWRAPPER_PYTHON` tells `virtualenvwrapper` to use the specified full path of the `python` interpreter overriding the `$PATH` search. ```sh export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python ``` The variable `VIRTUALENVWRAPPER_VIRTUALENV` tells `virtualenvwrapper` to use the specified full path of `virtualenv` binary overriding the `$PATH` search. ```sh export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv ``` The variable `$VIRTUALENVWRAPPER_VIRTUALENV_ARGS` tells `virtualenvwrapper` what arguments to pass to `virtualenv`. For example, set the value to `--system-site-packages` to ensure that all new environments have access to the system site-packages directory. ```sh export VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--system-site-packages' ``` ### Additional Options There is a hook to enable auto-switching to virtualenvs when switching into a directory where the root of the project matches a virtualenv name. This can be enabled with: ```sh zstyle ':prezto:module:python:virtualenv' auto-switch 'yes' ``` `virtualenvwrapper` is automatically initialized if pre-requisites are met (`$VIRTUALENVWRAPPER_VIRTUALENV` is explicitly set or `virtualenv` is in `$PATH`). This can be disabled with: ```sh zstyle ':prezto:module:python:virtualenv' initialize 'no' ``` Aliases ------- - `py` is short for `python`. - `py2` is short for `python2`. - `py3` is short for `python3`. Functions --------- - `python-info` exposes information about the Python environment via the `$python_info` associative array. Theming ------- To display the name of the current virtual enviroment in a prompt, define the following style in the `prompt_name_setup` function. # %v - virtualenv name. zstyle ':prezto:module:python:info:virtualenv' format 'virtualenv:%v' Then add `$python_info[virtualenv]` to `$PROMPT` or `$RPROMPT` and call `python-info` in the `prompt_name_preexec` hook function. Similarly, you can use `:prezto:module:python:info:version:format` with `%v` for the version and add `$python_info[version]` to your prompt for the current python version/ Authors ------- *The authors of this module should be contacted via the [issue tracker][5].* - [Sorin Ionescu](https://github.com/sorin-ionescu) - [Sebastian Wiesner](https://github.com/lunaryorn) [1]: http://www.python.org/dev/peps/pep-0370/ [2]: http://www.doughellmann.com/projects/virtualenvwrapper/ [3]: http://pypi.python.org/pypi/virtualenv [4]: https://github.com/yyuu/pyenv [5]: https://github.com/sorin-ionescu/prezto/issues [6]: https://github.com/sorin-ionescu/prezto/blob/master/runcoms/zshenv