变量错误: 未赋值之前引用的 'password'

Question

def start():

    global smallq
    global medq
    global larq
    check = input("Would you like to change prices? Press Y to change or Press N to  continue to order: ")

    if check == "Y":
        password = input("What is the password?: ")
    else:
        print("Continuing to order...")
        smallq = 50
        medq = 120
        larq = 180
        order()

    if password == "please":
        quilt_price()
    else:
        print("Wrong password", "\n", "Continuing to order...")
        smallq = 50
        medq = 120
        larq = 180
        order()

例外情况：

^{pr2}$

如果我写“N”来回答输入，它将运行order()，并且一切正常，除非order()完成后，它会出现错误。我尝试过使password成为全局的，但似乎没有效果。有什么想法吗？在

Answer 1

如果输入不是"Y"，怎么办？那么password就永远不会被创建，因此执行if password == "please"将引发一个错误。也许在你的条件语句之前做password = None。在