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).
Egypt’s Minister of Civil Aviation, Sameh El-Hefny, announced on Saturday the addition of Terminal 4 to Cairo International Airport (CAI) within four years. The project's cost has been estimated at $4 ...