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 ...

os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

Python falls short in a few areas. For instance, Python isn’t the fastest language around, but third-party libraries like NumPy let you work around that. Where Python is most deficient, though, is ...