pandas is a Python module that's popular in data science and data analysis. It's offers a way to organize data into DataFrames and offers lots of operations you can perform on this data. It was ...

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).

Invoicing is a crucial aspect of any business, but it can be time-consuming and prone to errors when done manually. Creating an automated invoice system in Python with a graphical user interface (GUI) ...