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).

The New York Power Authority is a cheerleader for the state's clean energy goals. So why do executives fly around in a climate-unfriendly private jet?

The New York Power Authority is a cheerleader for the state's clean energy goals. So why do executives fly around in a ...