简单登录，编码解码，

def login():
#
#     input("username:")
#
#     for i in range(0,3):
#         keywords = int(input("keywords:"))
#         if keywords == 123:
#             print("it's ok")
#             break
#         else:
#             i += 1
#     if keywords != 123:
#         print("it's 3 times")

    #
    # while  keywords != 123:
    #     print("not ok")
    #     keywords = int(input("keywords:"))
    #     break
    # while  keywords != 123:
    #     print("not ok")
    #     keywords = int(input("keywords:"))
    #     break
    # if keywords == 123:
    #     print("it's ok")
    # else:
    #     print("3 times ago")
# login()
# a = "告诉你的个"
# b = a.encode("gbk")
# print(b)
# c = b.decode("gbk")
#