Merge pull request #316 from hjwp/master

add an explanation + screenshot re adding python to the path on windows

Author: olasitarska

en/python_installation/README.md

@@ -16,6 +16,10 @@ Django is written in Python. We need Python to do anything in Django. Let's star
 
 You can download Python for Windows from the website https://www.python.org/downloads/release/python-343/. After downloading the ***.msi** file, you should run it (double-click on it) and follow the instructions there. It is important to remember the path (the directory) where you installed Python. It will be needed later!
 
+One thing to watch out for:  on the second screen of the installation wizard, marked "Customize", make sure you scroll down and choose the "Add python.exe to the Path" option, as in 
+
+![Don't forget to add Python to the Path](images/add_python_to_windows_path.png)
+
 ### Linux
 
 It is very likely that you already have Python installed out of the box. To check if you have it installed (and which version it is), open a console and type the following command: