Run the randomizer.py script.
The randomizer.py script generates pairs for all students for a lab, writing its output to lab_pairs.txt. the script pulls the list of students in each section from student_list.txt. Once the lab pairs are generated, they are added to previous_pairs.txt. This file contains a list of all pairs previously generated this semester. The randomizer attempts to generate pairs that are not present in the previous pairs, in order to prevent duplicate teams.
When a new semester starts, student_list.txt and previous_pairs.txt need to be updated. The contents of previous_pairs.txt must be deleted. student_list.txt needs to have each section updated to match the new rosters.