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Python
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======
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Enables local Python and local Python package installation.
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Local Python Installation
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-------------------------
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[pyenv][4] builds and installs multiple Python versions locally in the home
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directory.
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This module prepends the pyenv directory to the path variable to enable the
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execution of `pyenv`.
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### Usage
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Install Python versions with `pyenv install` into *~/.pyenv/versions*.
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Local Package Installation
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--------------------------
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Since version 2.6, Python supports per user package installation, as defined in
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[PEP 370][1].
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This module prepends per user site directories to the relevant path variables
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to enable the execution of user installed scripts and the reading of
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documentation.
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### Usage
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Install packages into the per user site directory with `easy_install --user` or
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`pip install --user`.
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virtualenvwrapper
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-----------------
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[virtualenvwrapper][2] is a frontend to the popular [virtualenv][3] utility.
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virtualenv creates isolated Python environments and virtualenvwrapper provides
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convenient shell functions to create, switch, and manage them.
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### Usage
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Install virtualenvwrapper.
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Virtual environments are stored in *~/.virtualenvs*.
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There are configuration variables that have to be set to enable certain features.
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If you wish to use these features, export the variables in *~/.zshenv*
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The variable `$PROJECT_HOME` tells virtualenvwrapper where to place project
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working directories. It must be set and the directory created before `mkproject`
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is used. Replace *Developer* with your projects directory.
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export PROJECT_HOME="$HOME/Developer"
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The variable `$VIRTUALENVWRAPPER_VIRTUALENV_ARGS` tells virtualenvwrapper what
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arguments to pass to `virtualenv`. For example, set the value to
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*--no-site-packages* to ensure that all new environments are isolated from the
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system site-packages directory.
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export VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--no-site-packages'
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Aliases
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-------
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- `py` is short for `python`.
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Functions
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---------
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- `python-info` exposes information about the Python environment via the
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`$python_info` associative array.
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Theming
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-------
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- `python_info[virtualenv]` exposes virtualenv name
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- `python_info[version]` exposes virtualenv python version (eg. py-3.4.1, py-2.7.6)
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To display the name of the current virtual enviroment in a prompt, define the
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following style in the `prompt_name_setup` function.
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# %v - virtualenv name.
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zstyle ':prezto:module:python:info:virtualenv' format 'virtualenv:%v'
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Then add `$python_info[virtualenv]` to `$PROMPT` or `$RPROMPT` and call
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`python-info` in the `prompt_name_precmd` hook function.
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Authors
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-------
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*The authors of this module should be contacted via the [issue tracker][5].*
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- [Sorin Ionescu](https://github.com/sorin-ionescu)
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- [Sebastian Wiesner](https://github.com/lunaryorn)
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[1]: http://www.python.org/dev/peps/pep-0370/
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[2]: http://www.doughellmann.com/projects/virtualenvwrapper/
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[3]: http://pypi.python.org/pypi/virtualenv
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[4]: https://github.com/yyuu/pyenv
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[5]: https://github.com/sorin-ionescu/prezto/issues
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