python - 尝试使用自定义类的 NameError

Question

我是 Python 的新手，正在学习类，正在尝试编写一个“个人信息”程序:

这是我的代码:

class PersonalInfo():    
    def names(self, name):
        name = raw_input("What is your name?")
        self.names = name

    def addresses(self, add):
        add = raw_input("What is your adress?")
        self.addresses = add

    def ages(self, age):
        age = raw_input("What is your age?")
        self.ages = age

    def numbers(self, number):
        number = raw_input("What is your phone number?")
        self.numbers = number

PersonalInfo()

def print_names():
    info = PersonalInfo()
    print "Name:", info.names(name)
    print "Address:", info.addresses(add)
    print "Age:", info.info.ages(age)
    print "Phone number:", info.numbers(number)

print_names()

但是当我运行它时，它是这样说的:

NameError: global name 'add' is not defined

有人可以帮帮我吗？

Answer 1

除了 NameError 之外，您的代码还有几个问题，我强烈建议您阅读更多关于 python 类的内容:

https://docs.python.org/2/tutorial/classes.html

https://www.tutorialspoint.com/python/python_classes_objects.htm

https://en.wikibooks.org/wiki/A_Beginner 's_Python_Tutorial/类

我会带您解决这些问题。

首先，NameError 的发生是因为未定义add 变量。这同样适用于您在打印语句中提供的所有其他参数。

其次，您定义类方法的方式存在问题:

class PersonalInfo():    
    def names(self, name):
        name = raw_input("What is your name?")
        self.names = name

在这里，您将 name 变量重新分配给 raw_input 的返回值，因此首先将其设置为参数是没有意义的。此外，通过声明 self.names = name，您正在将类方法重新分配给 raw_input 返回的字符串!

第三，您必须决定是在调用方法时还是使用raw_input 时提供信息。这是您的代码的一个工作示例，假设您要使用 raw_input

class PersonalInfo():    
    def names(self):
        name = raw_input("What is your name?")
        self.name = name

    def addresses(self):
        add = raw_input("What is your adress?")
        self.address = add

    def ages(self):
        age = raw_input("What is your age?")
        self.age = age

    def numbers(self):
        number = raw_input("What is your phone number?")
        self.number = number

def print_names():
    info = PersonalInfo()
    # Get information
    info.names()
    info.addresses()
    info.ages()
    info.numbers()
    # After getting the info, print it
    print "Name:", info.name
    print "Address:", info.address
    print "Age:", info.age
    print "Phone number:", info.number

print_names()