n-team, exactly-one-matchup league generator

schedule.py

import sys

teams = int(input("Input the number of teams")) if len(sys.argv) <= 1 else int(sys.argv[1])

weeks = []
for i in range(teams - 1):
    week = []
    remaining_teams = [*range(teams)]
    # Always 0
    fixed_point = remaining_teams.pop(0)
    # This is the circle part of the circle algorithm, and just position the elements conventiently for array methods
    wrapped_array = remaining_teams[i:] + remaining_teams[:i]
    opponent = wrapped_array.pop(0)
    week.append((fixed_point, opponent))
    # For odd teams sizes, the last team will just be unmatched.
    # This is equivalent to pairing it with the "Bye" team and discarding it
    while len(wrapped_array) > 1:
        week.append((wrapped_array.pop(0), wrapped_array.pop()))
    weeks.append(week)
print(weeks)