Question

class Dog():
   snip

my_dog = Dog('willie', 6)

print("My dog's name is " + my_dog.name.title() + ".")
print("My dog is " + str(my_dog.age) + " years old.")

错误：

Traceback (most recent call last): 
File "dog", line 1, in <module> class Dog(): snip File "dog", line 1, in Dog class Dog(): snip 
NameError: name 'snip' is not defined

Answer 1

您缺少构造函数，

在这里您应该定义要传递的参数

class Dog:
   def __init__(self,name,age):
       self.name = name
       self.age  = age
       # this way you are telling the class what is the argument you are passing
       # and how to assign it as class property


my_dog = Dog('willie', 6)

print("My dog's name is " + my_dog.name+ ".")
print("My dog is " + str(my_dog.age) + " years old.")

我是python的新手，目前正在使用python 3x，但我总是会收到此错误，有人可以帮我吗

1 个答案: