When adding a python module manually, the path to the module is added to sys.path. After restarting Slicer, the module path is no longer in sys.path although it's still present in the settings ...

What it is good for? Settings of the Python interpreter itself. The sys module provides an access point to the Python environment. You find there command line ...

Once you know how to add and use a Python module, you will greatly extend the capabilities of the language. A Python module is an external class or set of functions that exist outside the main file of ...