This tells pandas to build a pivot table, using the "region" column as the index, and the small, large, and "extra large" ...

The research aim is to develop an intelligent agent for cybersecurity systems capable of detecting abnormal user behavior ...

I don't know how to reproduce, but this is a case where it immediatly becomes ovious that we didn't validate user input. edit_fields is extracted from the request object and assumed that it's a string ...