The sys (Python system) module

The sys module, part of the standard library, refers to the Python installation itself. It has a number of methods that will get information about the version of Python installed, as well as information about the script, and any "arguments" supplied to the script, using the sys.argv method. The sys.path method is very useful for appending the Python file path; practically, this means that folders containing scripts can be referenced by other scripts to make the functions they contain importable.