python - 无法调用类 bark()

Question

我是 python 新手，我编写了以下代码。

我不明白为什么我不能从对象调用 bark() 类 并打印出来。我正在使用 eclipse pydev

请帮忙!!

class DOG():
    def __init__(self,mybreed):
        self.breed = mybreed
        def bark(self):
            print("WOOF {}".format(mybreed))

my_dog = DOG(mybreed="Goat")

print(my_dog.breed)
my_dog.breed = 'WOLF'
print(my_dog.breed)

print(my_dog.bark())

Answer 1

问题是缩进，您已在 __init__ 中定义了 brak，请将类定义更改为:

class DOG():
    def __init__(self, mybreed):
        self.breed = mybreed

    def bark(self):
        print("WOOF {}".format(self.breed))

In most other programming languages, indentation is used only to help make the code look pretty. But in Python, it is required for indicating what block of code a statement belongs to.

有用链接:Here

感谢@nixon，也感谢您应该使用self访问实例属性，请仔细查看format(self.breed)。