Day27.产生对象

1.产生对象

 

# 一.先定义类：存放共有的部分
# 类是对象相似数据与功能的集合体
# 所以类中最常见的是变量与函数的定义，但是类体其实是可以包含任意其他代码的
# 注意：类体代码是在类定义阶段就会立即执行，会产生类的名称空间
class Student:
    # 1.变量的定义
    stu_school = 'oldboy'

    # 2.功能的定义
    # 学生的功能
    def tell_stu_info(stu_obj):
        print('学生信息：名字：{} 年龄：{} 性别：{}'.format(
            stu_obj['stu_name'],
            stu_obj['stu_age'],
            stu_obj['stu_gender'],
            ))

    def set_info(stu_obj, x, y, z):
        stu_obj['stu_name'] = x
        stu_obj['stu_age'] = y
        stu_obj['stu_gender'] = z
    
#    print('==========> ')

# print('__dict__方法，查看类中所有的值'.center(40,'='))
# print(Student.__dict__)
# print('')


# print('属性访问的语法，用法：`类.属性`'.center(60, '='))
# print('__dict__方法，访问数据属性'.center(40,'='))
# print(Student.__dict__['stu_school'])
# print('__dict__方法，访问函数属性'.center(40,'='))
# print(Student.__dict__['set_info'])
# print('')
print('往类中增加属性值'.center(40, '='))
Student.x = 111 # Student.__dict__['x'] = 111
print(Student.__dict__)
print('')

# 二.再调用类产生对象
stu1_obj = Student()
stu2_obj = Student()
stu3_obj = Student()

print('往类中存放数据'.center(40, '='))
# 为对象定制自己独有的属性
# 问题1：代码重复
# 问题2：属性的查找顺序
# 简化后：使用`类.属性`存放数据       # 底层执行原理： 
stu1_obj.stu_name = 'egon'          # stu1_obj.__dict__['stu_name'] = 'egon'
stu1_obj.stu_age = 18               # stu1_obj.__dict__['stu_age'] = 18
stu1_obj.stu_gender = 'male'        # stu1_obj.__dict__['stu_gender'] = 'male'
print(stu1_obj.__dict__)

stu2_obj.stu_name = 'lili'          
stu2_obj.stu_age = 19               
stu2_obj.stu_gender = 'female'        
print(stu2_obj.__dict__)

stu3_obj.stu_name = 'jack'          
stu3_obj.stu_age = 20               
stu3_obj.stu_gender = 'male'        
print(stu3_obj.__dict__)