Question

即使同时满足两个函数都为真的条件，第二个while循环也不会退出。

第二个循环类似于第一个循环，可以很好地工作，所以我不确定要怎么做。

def access(self):
    print("Please enter your 5 digit account number:")
    self.accountNumber = input()
    while Customer.valueCheck(self.accountNumber) or Customer.accountNumberCheck(self.accountNumber) == False:
        if Customer.valueCheck(self.accountNumber) == False:
            print("The account number must be 5 digits only.")
        elif Customer.accountNumberCheck(self.accountNumber) == False:
            print("The account number given does not match the any on file.")
        print("Please try again:")
        self.accountNumber = input()
    print("Please enter your account name:")
    self.name = input()
    while Customer.nameCheck(self.name) or Customer.accountHolderCheck(self.accountNumber, self.name) == False:
        if Customer.nameCheck(self.name) == False:
            print("The name must contain alphabetic characters only.")
        elif Customer.accountHolderCheck(self.accountNumber, self.name) == False:
            print("The name given does not match the name paired with that account number.")
        print("Please try again:")
        self.name = input()
    print("")
    return (self.name, self.accountNumber)

def accountHolderCheck(accountNumber, name):
    with open("bank_data.txt", "r") as searchData:
        for line in searchData:
            line.strip().split("\n")
            if line.startswith(accountNumber):
                bank_search = line.strip().split(",")
                if bank_search[1] == name:
                    break
        else:
            return False

输入正确的值后，它会要求不说任何打印语句而再次尝试，这意味着它们都正确，但是如果两个都正确，那么肯定不应该运行循环吗？

Answer 1

您需要在两个条件前后加上括号。目前，您正在检查两种不同的情况：

Customer.valueCheck(self.accountNumber)

和

Customer.accountNumberCheck(self.accountNumber) == False

换句话说，第一个条件是检查该第一部分是否正确，而不是错误。因此，如果两个条件都为true，则循环将因为满足第一个条件而运行，但两个条件都不为假，因此您的最后一个print语句

print("Please try again:")

将被触发。

相反，使用：

while (Customer.valueCheck(self.accountNumber) and Customer.accountNumberCheck(self.accountNumber)) == False:
...

这将检查任一条件是否为假，如果两个条件都为真，则将不会运行。

Answer 2

简短：输入部分（print（“请重试：”）self.name = input（））没有缩进。长：由于输入部分没有缩进，因此无论值正确与否，它都将始终运行。这是固定版本：

        if Customer.nameCheck(self.name) == False:
            print("The name must contain alphabetic characters only.")
            self.name = input("Please try again: ")
        elif Customer.accountHolderCheck(self.accountNumber, self.name) == False:
            print("The name given does not match the name paired with that account number.")
            self.name = input("Please try again: ")

此外，请查看thehumaneraser的贡献，因为这也是您需要解决的问题。这是最终版本：

def access(self):
    print("Please enter your 5 digit account number:")
    self.accountNumber = input()
    while Customer.valueCheck(self.accountNumber) == False or Customer.accountNumberCheck(self.accountNumber) == False:
        if Customer.valueCheck(self.accountNumber) == False:
            print("The account number must be 5 digits only.")
            print("Please try again:")
            self.accountNumber = input()
        elif Customer.accountNumberCheck(self.accountNumber) == False:
            print("The account number given does not match the any on file.")
            print("Please try again:")
            self.accountNumber = input()
    print("Please enter your account name:")
    self.name = input()
    while Customer.nameCheck(self.name) == False or Customer.accountHolderCheck(self.accountNumber, self.name) == False:
        if Customer.nameCheck(self.name) == False:
            print("The name must contain alphabetic characters only.")
            self.name = input("Please try again:")
        elif Customer.accountHolderCheck(self.accountNumber, self.name) == False:
            print("The name given does not match the name paired with that account number.")
            self.name = input("Please try again:")
    print("")
    return (self.name, self.accountNumber)

def accountHolderCheck（accountNumber，name）：使用open（“ bank_data.txt”，“ r”）作为searchData：对于searchData中的行： line.strip（）。split（“ \ n”）如果line.startswith（accountNumber）： bank_search = line.strip（）。split（“，”）如果bank_search [1] ==名称：打破其他：返回False

尽管满足条件，但while循环不会退出

2 个答案: