Python child class 错误

Question

我是 python 的新手，正在为一个学校项目编写此代码。我收到了一些错误消息并且在更正它们时遇到了问题。任何指导将不胜感激。

enter code here
class Mammal():
def __init__(self, name='', size='', sound=''):
  self.name = name
  self.size = size
  self.sound = sound

class Gorilla(Mammal):
    def __init__(self, name, size,sound, type):
    super().__init__(name, size, sound)
    self.type = type


Silverback = Gorilla(Barney, large, grunts)
print("The gorilla type is"+ Gorilla.type)
print(" The gorilla's name is"+ Gorilla.name)
print(' The gorilla is'+ Gorilla.size)
print('the gorilla sound is'+ Gorilla.sound )


class Bear(Mammal):
    def __init__(self, name, size,sound, type):
    super().__init__(name, size, sound)
    self.type = type

Polar = Bear(Henry, large, roar)
print("The bear type is"+ Bear.type)
print(" The bear's name is"+ Bear.name)
print(' The bear is'+ Bear.size)
print('the bear says'+ Bear.sound )



b = Bear()
g = Gorilla()
if (b == g):
    print(b.getGenus() + " and " + g.getGenus() + " are of the same genus")
else:
    print(b.getGenus() + " and " + g.getGenus() + " are *not* of the same 
genus")


def listenToMammal(Mammal):
    print(Mammal.makeNoise())


listenToMammal(B)
listenToMammal(G)

代码只有运行第 13 行并给我错误：追溯（最近一次通话）：文件“C:/Users/Owner/PycharmProjects/pythonProject/main.py”，第 13 行，位于 Silverback = 大猩猩（巴尼，大，咕噜声） NameError：名称 'Barney' 未定义

Answer 1

因为它正在搜索名为 Barney 的变量，而没有您定义的变量。对于参数，您必须在初始化对象之前用引号传递或定义

silverback = Gorilla("Barney", "large", "grunts") 要打印它，请不要使用 class 名称，请使用您初始化对象的变量。

Print(" the Gorilla type is "+silverback.type)

Python child class 错误

Python child class errors

parent-child

superclass

python-3.x