punish.py

#!/usr/bin/env python

# My cruel teacher asked me to write 20 times this:
stupid_line = "I will not be late to school again\n"

import sys; # I want to use standard output, and exit nicely

n = 0
while n < 20: 
    sys.stdout.write(stupid_line)
    n = n + 1

sys.exit(0)