SHA1_with_timestamp.py

import time
import hashlib

serial = 'QQ0001'

if __name__ == '__main__':
    now_time = time.time()
    print(now_time)
    h1 = hashlib.sha1()
    h1.update((str(now_time) + serial).encode('utf-8'))
    print('h1 is ', h1.hexdigest())
    h2 = hashlib.sha1()
    h2.update((str(now_time) + serial).encode('utf-8'))
    print('h2 is ', h2.hexdigest())
    print('h1 == h2 ?', (h1.hexdigest() == h2.hexdigest()))
    
# $ python h.py                                                                                                                                              2.3.5
# 1522747460.2899463
# h1 is  6c5fda997ddd4b9e3f69f2c14b540d7439235f35
# h2 is  6c5fda997ddd4b9e3f69f2c14b540d7439235f35
# h1 == h2 ? True