how to keep checking for a while loop python code example

Example 1: infinite while python

#infinite While on Python

while True:
  print('Hello World!')

Example 2: how to end an infinite loop in specific time python

import time

# timeout variable can be omitted, if you use specific value in the while condition
timeout = 300   # [seconds]

timeout_start = time.time()

while time.time() < timeout_start + timeout:
    test = 0
    if test == 5:
        break
    test -= 1