问题描述
我写了以下代码。
class Mammal:
def info():
return 'I have fur on my body.'
def identity_mammal():
print('I am a mammal')
class Primate(Mammal):
def info():
return Mammal.info() + ' I have a large brain.'
def identity_primate():
print('I am a primate')
class Ape(Primate):
def info():
return Primate.info() + ' I am monkey oooh oooh aaah aaah.'
def identity_ape():
print('I am an ape')
class Human(Primate):
def info():
return Primate.info() + ' I am human,me bipedal SMART monkey'
def identity_human():
print('I am a human')
John = Human
print(isinstance(John,Mammal))
print(isinstance(John,Primate))
print(isinstance(John,Human))
print(isinstance(John,Ape))
这是一个关于继承的简单任务,但是当我使用isinstance函数时,我刚刚创建的Human实例似乎不是人类
[iveris@ic-rh7mnifi-105 oblig44]$ python3 inheritance.py
False
False
False
False
解决方法
要创建实例,您需要使用括号:
John = Human()
print(isinstance(John,Mammal))
print(isinstance(John,Primate))
print(isinstance(John,Human))
print(isinstance(John,Ape))