class Dog:
    def behavior(self,skill):
        print ('小狗会%s!'%skill)

class Cat:
    def behavior(self,skill):
        print ('小猫会%s!'%skill)

class Host:
    def pet(self,met,*arg):
        print ('小明的宠物有特殊技能，',end = '')
        met.behavior(self,*arg)

H = Host()
H.pet(Dog,'唱')    # 打印 小明的宠物有特殊技能，小狗会唱!
H.pet(Cat,'跳')     # 打印 小明的宠物有特殊技能，小猫会跳!

>>> help(issubclass)
Help on built-in function issubclass in module builtins:

issubclass(cls, class_or_tuple, /)
    Return whether 'cls' is a derived from another class or is the same class.
    
    A tuple, as in ``issubclass(x, (A, B, ...))``, may be given as the target to
    check against. This is equivalent to ``issubclass(x, A) or issubclass(x, B)
    or ...`` etc.

class Dog:
    def behavior(self):
        print ('小狗会唱!')

class Cat:
    def skill(self):
        print ('小猫会跳!')

class Host(Dog):
    def pet(self):
        print ('小明有一只宠物！')
    
print (issubclass(Cat,Cat)) # 同一个类，打印 True
print (issubclass(Dog,Host)) # Dog类是Host类的父类，所以打印 False
print (issubclass(Dog,Cat)) # Dog类不是Cat类的子类，所以打印 False
print (issubclass(Host,Dog)) # Host类是Dog类的子类，所以打印 True

>>> help(isinstance)
Help on built-in function isinstance in module builtins:

isinstance(obj, class_or_tuple, /)
    Return whether an object is an instance of a class or of a subclass thereof.
    
    A tuple, as in ``isinstance(x, (A, B, ...))``, may be given as the target to
    check against. This is equivalent to ``isinstance(x, A) or isinstance(x, B)
    or ...`` etc.

a = '1111'
print (type(a)) # <class 'str'>
print (isinstance(a,str))  # 参数a类型不是str，返回 True
print (isinstance(a,int))  # 参数a类型不是int，返回 False