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One of the most common problems with running Python tools like pip is the “not on PATH” error. This means that Python cannot find the tool you’re trying to run in your current directory. In most cases, you’ll need to navigate to the directory in which the tool is installed before you can run the command to launch it.
If you’d rather run pip (or other tools) from any location, you’ll need to add the directory in which it’s installed as a PATH environment variable by doing the following:
Open up the Control Panel and navigate to System and Security > System
Click on the Advanced system settings link on the left panel
Click Environment Variables.
Under System Variables, double-click the variable PATH.
Click New, and add the directory where pip is installed, e.g.
C:\Python\33Scripts, and select OK.
Tackar!