def crypt(source,key):

     from itertools import cycle

     result=''

     temp=cycle(key)

     for ch in source:

         result=result+chr(ord(ch)^ord(next(temp)))

     return result

 source='Jiangxi Insstitute of Busiess and Technology'

 key='zWrite'

 print('Before Encrypted:'+source)

 encrypted=crypt(source,key)

 print('After Encrypted:'+encrypted)

 decrypted=crypt(encrypted,key)

 print('After Decrypted:'+decrypted)

 # Before Encrypted:Jiangxi Insstitute of Busiess and Technology

 # After Encrypted:0>w;>Z8I6    >E9I ?

 # .

 # After Decrypted:Jiangxi Insstitute of Busiess and Technology