Never-Gonna-Give-Beep-Up/beepemu-sox

#!/usr/bin/python

import os
import sys
import time

i = 1
f = 0
l = 0
while i < len(sys.argv):
    if sys.argv[i] == '-f':
        i += 1
        f = float(sys.argv[i])
    elif sys.argv[i] == '-l':
        i += 1
        l = float(sys.argv[i])/1000
    elif sys.argv[i] == '-D':
        i += 1
        time.sleep(float(sys.argv[i])/1000)
    if f != 0 and l != 0:
        print(f, l)
        os.system(f'play -n synth {l*0.75} sawtooth {f} &')
        time.sleep(l)
        f = 0
        l = 0
    i += 1