Installing Python 2 on Windows¶

Note Check out our guide for installing Python 3 on Windows.

First, download the latest version of Python 2.7 from the official website. If you want to be sure you are installing a fully up-to-date version, click the Downloads > Windows link from the home page of the Python.org web site .

The Windows version is provided as an MSI package. To install it manually, just double-click the file. The MSI package format allows Windows administrators to automate installation with their standard tools.

By design, Python installs to a directory with the version number embedded, e.g. Python version 2.7 will install at C:\Python27\ , so that you can have multiple versions of Python on the same system without conflicts. Of course, only one interpreter can be the default application for Python file types. It also does not automatically modify the PATH environment variable, so that you always have control over which copy of Python is run.

Typing the full path name for a Python interpreter each time quickly gets tedious, so add the directories for your default Python version to the PATH . Assuming that your Python installation is in C:\Python27\ , add this to your PATH :

C:\Python27\;C:\Python27\Scripts\

You can do this easily by running the following in powershell :

[Environment] :: SetEnvironmentVariable ( "Path" , "$env:Path;C:\Python27\;C:\Python27\Scripts\" , "User" )

This is also an option during the installation process.

The second ( Scripts ) directory receives command files when certain packages are installed, so it is a very useful addition. You do not need to install or configure anything else to use Python. Having said that, I would strongly recommend that you install the tools and libraries described in the next section before you start building Python applications for real-world use. In particular, you should always install Setuptools, as it makes it much easier for you to use other third-party Python libraries.