Object-Oriented Programming

　　A class is a combination of similar characteristics and skills of a series of objects. For the same thing, the classes obtained from different angles are different.

　　The relationship between objects and classes

　　In the real world, there must be objects first and then classes; but in the program, it is just the opposite. Classes must be defined first, and then classes are called to generate objects.

#First define the class 
class LuffyStudent:
    school = 'luffycity'

    def learn(self):
        print('is learning')

    def eat(self):
        print('is eating')

    def sleep(self):
        print('is sleeping')


#After the object is generated 
stu1 = LuffyStudent() #Instead   of executing the class body, instantiate 
stu2 = LuffyStudent()
stu3 = LuffyStudent()
print(stu1)  # <__main__.LuffyStudent object at 0x10401ae80>

 

__dict__ method

 

 

 

self, is the instance itself! When you instantiate it, the python interpreter will automatically pass the instance itself through the self parameter.