python executable path to your Window’s PATH variable.
- From the desktop, right-click My Computer and click Properties.
- In the System Properties window, click on the Advanced tab.
- In the Advanced section, click the Environment Variables button.
- Highlight the Path variable in the Systems Variable section and click the Edit button.
- Add the path of your python executable(
c:\Python27\
). Each different directory is separated with a semicolon. (Note: do not put spaces between elements in thePATH
. Your addition to thePATH
should read;c:\Python27
NOT; C\Python27
) - Apply the changes. You might need to restart your system, though simply restarting
cmd.exe
should be sufficient. - Launch cmd and try again. It should work.
Start Menu and right click My Computer. Click on Advanced System Settings.
Then click on Environment Variables. This is where we can add Python to the PATH environmental variable.
Find the PATH
variable and click Edit. You want to add Python to this PATH variable by adding ;C:\Python27 to the end of that string (or whatever the path to your Python installation is).
Save your changes!
So what exactly is happening here?
When you type in python
in a command prompt, Windows will use the PATH
environmental variable to get a list of directories to go looking for the python.exe file. Before you followed the steps here, it couldn’t find the python.exe file, hence the error.
Now that the PATH
variable is set, when you execute python
via the Windows console, you’ll see a familiar programming prompt.
Python running on Windows!