python - Creating while loop based on txt length? -


so trying create loop checks length of txt file. running separate script write text file while script running. when length in txt file longer 5 want break , progress rest of script. seems need have script check txt file each cycle, unsure of how this. how set up?

code- 

import time   def start():     open('test.txt') token_text:         token = token_text.read().splitlines()         response_token = (token[0])         while len(response_token) <= 5:             try:                 print("waiting captcha")                 time.sleep(1)             except:                 print('captcha ready')                 break         print("script start")    start()

i create function obtain token length:

def token_length():     open('test.txt') file:         return len(file.read().splitlines()[0])  while token_length() <= 5:     print('waiting')     time.sleep(1)  print('ready')

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