Reading multiple CSV and then evaluate with python

Hello,

I have 12 Excel files, which I first read into Knime with a CSV reader.

The file contains the order number (NUM), article (NUM), quantity (NUM), cost per article (0.00€), order time (date and time), address (street, no., postal code and city).

Now I want to sort out and analyze faulty lines with Python, but I don’t know how to access this read csv file in my python code.