python 加密 from cryptography.fernet import Fernet

from cryptography.fernet import Fernet

def encrdecr(keyval, textencr, textdecr):
# Write your code here
key = keyval  #   key = Fernet.generate_key()
f = Fernet(key)
result = []
result.append(f.encrypt(textencr))
result.append(f.decrypt(textdecr).decode()) # python去除 b'
return(result)