Question

我有一个while循环，似乎正在跳过我的第一个if语句，而直接移到else语句。我已经三遍检查了代码，这似乎是正确的，但它仍然不会确认我的第一个if语句。（程序中有很多代码未包含在此问题中）

我尝试将else语句移到不同的索引，并重新配置initialize_objects()函数以返回主列表，而不是None。似乎没有任何作用，因为我没有收到错误，无论如何它只会在底部运行else语句。

def initialize_objects():
        global jackson_checking, jackson_savings, jackson_business, master_list



        jackson_checking = CheckingAccount('Jackson', 4100)
        jackson_savings = SavingsAccount('Jackson', 100000)
        jackson_business = BusinessAccount('Jackson', 15000)


        master_list = [[jackson_checking, 1, 1], [jackson_savings, 1, 2], [jackson_business, 1, 3]]


        return None

    initialize_objects()

    while isSessionOn is True:
        print('Welcome to 24-hour ATM service.')
        print('insert your card.')


        # Card reading the customer info representation
        customerID = input('Enter your customer id number: ')
        print("\n")


        cust_accounts = []
        for i in master_list:
            if i[1] == customerID:
                cust_accounts.append(i[2])
                isCustomer = True 

        if isCustomer is True:
            isAccountSelected = False


        else:
            print("cannot find your record.")
            print("Please get your card.")
            print("Closing this session...")

我期望发生的事情是if customerID == 1，然后该程序应转到isAccountSelected（此问题中不包括）下面的另一个while循环。相反，当我输入1作为customerID的输入时，发生的事情是，它直接移到底部的else语句，并继续询问另一个CustomerID ...

它看起来像这样：

Welcome to 24-hour ATM service.
insert your card.
Enter your customer id number: 1


cannot find your record.
Please get your card.
Closing this session...
Welcome to 24-hour ATM service.
insert your card.
Enter your customer id number: 1


cannot find your record.
Please get your card.
Closing this session...
Welcome to 24-hour ATM service.
insert your card.
Enter your customer id number:

Answer 1

这是因为Python中的input总是返回一个字符串。因此，当用户输入1作为其ID时，Python程序实际上使customerID为字符串"1"。因此，当您尝试比较1=="1"时，它总是失败并且总是进入else块。

我的while循环跳过if语句，直接进入else语句

1 个答案: