Question

我是Python的新手，我只是在学习Classes，并且正在尝试编写“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()

但是当我运行它时会说：

NameError: global name 'add' is not defined

有人可以帮帮我吗？

Answer 1

除NameError之外，您的代码存在一些问题，我强烈建议您阅读有关python类的更多信息：

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

我会告诉你这些问题。

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

其次，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。另外，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，您必须在调用方法或使用raw_input时决定是否要提供信息。这是一个代码的工作示例，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()

尝试使用自定义类的NameError

1 个答案: