Locating Python modules

After encountering the import statement, the Python interpreter searches the module in the following sequence:

1. The current directory, which contains the running script. I advise you, be sure, that the name of your program is different from the importing modules.
2. PYTHONPATH has to be defined in the environment variable in Windows OS. Let's learn by example. Consider we move the mod5.py program to another directory as covered in the following screenshot.

But the current directory does not contain any module1 module. The output will be as shown here:

Output of mod5.py  in a different directory 

We are running the mod5.py program from F:project_7daysmodulepack. The output shown there is no module1 module found. Let's set the PYTHONPATH variable as shown here:

Setting the PYTHONPATH variable

After setting PYTHONPATH, you will have to reboot your computer. After reboot, start the program again.

The output will be as shown here:

This is the output of the program after setting PYTHONPATH...