Path 1: 13 calls (0.93)

→ year 2004 (11) 9999 (1) 2001 (1)

→ month 12 (2) 2 (2) 3 (1) 4 (1) 5 (1) 6 (1) 7 (1) 8 (1) 9 (1) 10 (1)

↩ return (9999, 11) (1) (2001, 1) (1) (2004, 1) (1) (2004, 2) (1) (2004, 3) (1) (2004, 4) (1) (2004, 5) (1) (2004, 6) (1) (2004, 7) (1) (2004, 8) (1)

2 run 1 not run

1def _prevmonth(year, month):
2    if month == 1:
3        return year-1, 12
4    else:
5        return year, month-1
            

Path 2: 1 calls (0.07)

→ year 2004 (1)

→ month 1 (1)

↩ return (2003, 12) (1)

2 run 1 not run

1def _prevmonth(year, month):
2    if month == 1:
3        return year-1, 12
4    else:
5        return year, month-1