Python

The following command will install Python 2.7 and any dependencies required (it can take a few minutes to build everything):

When finished, you should get a summary in the terminal. Running should output /usr/local/bin/python.

It also installed (and its dependency Setuptools), which is the package manager for Python. Let’s upgrade them both:

$ pip install --upgrade setuptools

Executable scripts from Python packages you install will be put in /usr/local/share/python, we already had this in the Env.sh file created before. Save the file and open a new terminal to take the new $PATH into account (everytime you open a terminal, .bash_profile gets loaded).

Pyenv method

To upgrade pyenv in the future, use upgrade instead of install.
After installing, add pyenv init to your shell to enable shims and autocompletion.

Restart your shell so the path changes take effect. You can now begin using pyenv.

$ exec $SHELL

To list the all available versions of Python, including Anaconda, Jython, pypy, and stackless, use:

$ pyenv install --list

Then install the desired versions:

The leading version takes priority.
All installed Python versions can be located in ~/.pyenv/versions. Alternatively, you can run:

$ pyenv versions
  system (set by /Users/your_account/.pyenv/version)
* 3.5.2

This shows an asterisk * next to the currently active version.

Local application-specific Python version

The local command will set local application-specific Python version(s) by writing the version name to a file in the current directory. This version overrides the global version. For example, to install anaconda3-4.1.1 in path/to/directory: