Python 用户数据校验

Question

我有一个程序可以获取用户的输入，然后询问信息是否正确。但是，当用户输入完信息后，我收到以下代码的错误:

#Welcome
print("Welcome to the game!\n")


def data():
    #Age
    age = int(input("Enter your age: "))
    #Gender
    gen = input("Enter your gender: ")
    #email
    mail = input("Enter your email: ")
    #username
    name = input("Enter your name: ")
    return (age, gen, mail, name)

def datacheck():
    print("Your information:\n")
    print("Age: ", age, "\n")
    print("Gender: ", gen, "\n")
    print("Email: ", mail, "\n")
    print("Username: ", name, "\n")
    yn = input("Is it correct? Yes or No: ")
    if yn == "Yes":
        print("Hello, ", name)
    if yn == "No":
        data()
        #Array to variables
        age = data[0]
        gen = data[1]
        mail = data[2]
        name = data[3]
        #datacheck
        datacheck()


data = data()


#Array to Variable.
age = data[0]
gen = data[1]
mail = data[2]
name = data[3]
#datacheck
datacheck()

我得到的错误是:

Traceback (most recent call last): File "/Users/joe/Documents/test123.py", line 48, in datacheck() File "/Users/joe/Documents/test123.py", line 20, in datacheck print("Age: ", age, "\n") UnboundLocalError: local variable 'age' referenced before assignment

如果我输入没有错误，但重新输入信息不起作用:

#Welcome
print("Welcome to the game!\n")


def data():
    #Age
    age = int(input("Enter your age: "))
    #Gender
    gen = input("Enter your gender: ")
    #email
    mail = input("Enter your email: ")
    #username
    name = input("Enter your name: ")
    return (age, gen, mail, name)

def datacheck():
    print("Your information:\n")
    print("Age: ", age, "\n")
    print("Gender: ", gen, "\n")
    print("Email: ", mail, "\n")
    print("Username: ", name, "\n")
    yn = input("Is it correct? Yes or No: ")
    if yn == "Yes":
        print("Hello, ", name)
    if yn == "No":
        data()
        #datacheck
        datacheck()


data = data()


#Array to Variable.
age = data[0]
gen = data[1]
mail = data[2]
name = data[3]
#datacheck
datacheck()

我如何获取它以便用户可以重新输入他们的信息(数据功能)？

Answer 1

你有一个 scoping问题。

此外，我认为您可能想考虑成为 object oriented .也就是说，如果我对您使用用户数据的假设是正确的。您可以将用户的属性保存在称为 object 的东西中，而不是将用户的属性保存在一堆数组(列表)中。 .我的意思是，如果您的用户最终拥有 2,000 个属性，您是否需要记住代表他们眼睛颜色的属性编号以便您可以在列表中引用它？可能不会。哈哈

这种方法可能会使您的代码更易于使用/重用，并且在未来更有条理:

class User():
    """A class representing a user.

    defaults set.
    """

    def __init__(self, data={'age': 1,
                             'gender': 'x',
                             'mail': 'user@default',
                             'name': 'User'}):

        self.data = data
        self.age = self.data['age']
        self.gender = self.data['gender']
        self.mail = self.data['mail']
        self.name = self.data['name']

    def __str__(self):
        """The string representation of a User object."""

        return self.name


    def get_age(self):
        """Return the user's age."""

        return self.age

    def get_gender(self):
        """Return the user's gender."""

        return self.gen

    def get_mail(self):
        """Return the user's email address."""

        return self.mail

    def get_name(self):
        """Return the user's name."""

        return self.name

    def get_data(self):
        """Return a dictionary containing a User's info."""

        return self.data

if __name__=="__main__":

    user_data = {} # will contain our data

    # ask for user input
    for key in ["age", "gender", "mail", "name"]:
        user_data[key] = raw_input("Enter your %s: " % key)

    # Store user input data in an object
    user = User(data=user_data)

    print user.get_data() # prints a dictionary containing user values