python stop while loop after time

1import time
2
3# timeout variable can be omitted, if you use specific value in the while condition
4timeout = 300   # [seconds]
5
6timeout_start = time.time()
7
8while time.time() < timeout_start + timeout:
9    test = 0
10    if test == 5:
11        break
12    test -= 1

1import time
2timeout = time.time() + 60*5   # 5 minutes from now
3while True:
4    test = 0
5    if test == 5 or time.time() > timeout:
6        break
7    test = test - 1