For many articles explaining inheritance of python classes, most of them talk about concepts such as oop and polymorphism. I think this may be helpful to developers with a certain foundation. It's not that big. It's better to directly use the code written in various situations to show the effect of running the code for a certain code situation. This may be more helpful to developers. Don’t talk nonsense, just go straight to the code.
There is no distinction between classic classes and new-style classes. The following analysis applies to both new-style classes and classic classes.For the initfunction in the class, it is just an initialization call a function (ps: initialization and instance creation are not a process, the creation of the instance is completed through a create function), if there is no explicit declaration of the init function in the subclass, the subclass will call the init of the parent class function, but the init function in the parent class of the parent class will not be called again. If the init function is explicitly declared, the initialization function of the parent class will not be called during the initialization of the subclass, only the declaration in the subclass will be called. init function, and at the same time, in the subclass instance, there will be no attribute declared in the parent class init function. Example:
class animal(): name="hh" sex="man" def init(self): self.height=10 self.weight=50 def deception(self): print "ansible.height:"+self.height+" animal.weight:"+self.weight def run(self): print "animal is running...."class dog(animal): def init(self): passif name=="main": dg=dog() print dg.dict
class dog(animal): def run(self): print "dog is running..."
class animal(): name="hh" sex="" def init(self): self.height=10 self.weight=50 def deception(self): print "ansible.height:"+self.height+" animal.weight:"+self.weight def run(self): print "animal is running...."class dog(animal): def init(self): pass def run(self): print "dog is running..."class jinmao(dog): # def init(self): # self.ji="jinmao" passif name=="main": dg=jinmao() print dg.dict
{}
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