President Donald Trump said Thursday that he will put import taxes of 100% on pharmaceutical drugs, 50% on kitchen cabinets and bathroom vanities, 30% on upholstered furniture and 25% on heavy trucks ...

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).