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).

Fans of legendary British comic troupe Monty Python are eagerly awaiting next month’s return to live stage shows – and now one of their most iconic sketches has become as a mobile game. Monty Python's ...