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).

Although built for mobile, Telegram has apps for Android, iOS, Linux, macOS, and Windows, in addition to web apps. The ...

Learn more about our publishing process such as our initial assessment of submissions, our journal transfer service and the publication of accepted manuscripts. This page also outlines our editorial ...