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).

Author: Zhang Qi, Senior Vice President of Microsoft Global and President of Microsoft AI Asia Pacific. Today, we officially ...

If you want to start investing in the stock market, your first step is setting up a brokerage account. You can think of this account as the vehicle that transports your money to your investments.