继承继承可以让子类继承父类的变量以及方法，并且我们还可以在子类当中指定一些属于自己的特性，并且还可以重写父类的一些方法 。一般我们会将不同的类放在不同的文件当中，使用import引入，一样可以实现继承 。
from human import Human# Specify the parent class(es) as parameters to the class definitionclass Superhero(Human):# If the child class should inherit all of the parent's definitions without# any modifications, you can just use the "pass" keyword (and nothing else)# but in this case it is commented out to allow for a unique child class:# pass# 如果要完全继承父类的所有的实现，我们可以使用关键字pass，表示跳过 。这样不会修改父类当中的实现# Child classes can override their parents' attributesspecies = 'Superhuman'# Children automatically inherit their parent class's constructor including# its arguments, but can also define additional arguments or definitions# and override its methods such as the class constructor.# This constructor inherits the "name" argument from the "Human" class and# adds the "superpower" and "movie" arguments:# 子类会完全继承父类的构造方法，我们也可以进行改造，比如额外增加一些参数def __init__(self, name, movie=False,superpowers=["super strength", "bulletproofing"]):# add additional class attributes:# 额外新增的参数self.fictional = Trueself.movie = movie# be aware of mutable default values, since defaults are sharedself.superpowers = superpowers# The "super" function lets you access the parent class's methods# that are overridden by the child, in this case, the __init__ method.# This calls the parent class constructor:# 子类可以通过super关键字调用父类的方法super().__init__(name)# override the sing method# 重写父类的sing方法def sing(self):return 'Dun, dun, DUN!'# add an additional instance method# 新增方法，只属于子类def boast(self):for power in self.superpowers:print("I wield the power of {pow}!".format(pow=power))复制代码if __name__ == '__main__':sup = Superhero(name="Tick")# Instance type checks# 检查继承关系if isinstance(sup, Human):print('I am human')# 检查类型if type(sup) is Superhero:print('I am a superhero')# Get the Method Resolution search Order used by both getattr() and super()# This attribute is dynamic and can be updated# 查看方法查询的顺序# 先是自身，然后沿着继承顺序往上，最后到objectprint(Superhero.__mro__)# => (<class '__main__.Superhero'>,# => <class 'human.Human'>, <class 'object'>)# 相同的属性子类覆盖了父类# Calls parent method but uses its own class attributeprint(sup.get_species())# => Superhuman# Calls overridden method# 相同的方法也覆盖了父类print(sup.sing())# => Dun, dun, DUN!# Calls method from Human# 继承了父类的方法sup.say('Spoon')# => Tick: Spoon# Call method that exists only in Superhero# 子类特有的方法sup.boast()# => I wield the power of super strength!# => I wield the power of bulletproofing!# Inherited class attributesup.age = 31print(sup.age)# => 31# Attribute that only exists within Superheroprint('Am I Oscar eligible? ' + str(sup.movie))多继承我们创建一个蝙蝠类：
# Another class definition# bat.pyclass Bat:species = 'Baty'def __init__(self, can_fly=True):self.fly = can_fly# This class also has a say methoddef say(self, msg):msg = '... ... ...'return msg# And its own method as well# 蝙蝠独有的声呐方法def sonar(self):return '))) ... ((('if __name__ == '__main__':b = Bat()print(b.say('hello'))print(b.fly)复制代码我们再创建一个蝙蝠侠的类，同时继承Superhero和Bat：
# And yet another class definition that inherits from Superhero and Bat# superhero.pyfrom superhero import Superherofrom bat import Bat# Define Batman as a child that inherits from both Superhero and Batclass Batman(Superhero, Bat):def __init__(self, *args, **kwargs):# Typically to inherit attributes you have to call super:# super(Batman, self).__init__(*args, **kwargs)# However we are dealing with multiple inheritance here, and super()# only works with the next base class in the MRO list.# So instead we explicitly call __init__ for all ancestors.# The use of *args and **kwargs allows for a clean way to pass arguments,# with each parent "peeling a layer of the onion".# 通过类名调用两个父类各自的构造方法Superhero.__init__(self, 'anonymous', movie=True,superpowers=['Wealthy'], *args, **kwargs)Bat.__init__(self, *args, can_fly=False, **kwargs)# override the value for the name attributeself.name = 'Sad Affleck'# 重写父类的sing方法def sing(self):return 'nan nan nan nan nan batman!'