with open(txtPath, 'a+', encoding='utf-8') as f:

This line of code opens a file in "append" mode, meaning any data written to the file will be added to the end of the existing data. The "utf-8" encoding is used to ensure that the text in the file is properly encoded and can be read by other programs or systems. The "with" statement ensures that the file is properly closed after the code block completes.