# Cheatsheet: pyenv, virtualenvwrapper, and pip

## Installation (for Mac OS)

### Install pyenv with brew

```
brew update
brew install pyenv
```

Add the following line to `~/.bash_profile`:

```
eval "$(pyenv init -)"
```

### Install pyenv-virtualenvwrapper

```
brew install pyenv-virtualenvwrapper
pyenv virtualenvwrapper
```

Add the following to `~/.bash_profile`:

```
export PYENV_VIRTUALENVWRAPPER_PREFER_PYVENV="true"
```

Restart your shell or source your profile:

```
source ~/.bash_profile
```

### Install pyenv-pip-rehash

```
git clone https://github.com/yyuu/pyenv-pip-rehash.git ~/.pyenv/plugins/pyenv-pip-rehash
```

## Usage

List available Python versions you can install:

```
pyenv install --list
```

Install a Python version

```
pyenv install 2.7.8
pyenv install 3.4.1
```

See what Python versions you have installed:

```
pyenv versions
```

Switch Python versions globally or locally:

```
pyenv global 2.7.8
pyenv local 2.7.8
```

Create a virtualenv:

```
mkvirtualenv my-venv
```

Install a package with pip:

```
pip install ipython
```