目录
- 一、属性查找
一、属性查找
- 先从对象自己的名称空间找,没有则去类中找,如果类也没有则报错
class OldboyStudent: school = 'oldboy' count = 0 aa = 10 def __init__(self, x, y, z): #会在调用类时自动触发 self.name = x # stu1.name='耗哥' self.age = y # stu1.age=18 self.sex = z # stu1.sex='male' OldboyStudent.count += 1 # self.count += 5 self.aa = 1 def choose_course(self): print('is choosing course')
print(OldboyStudent.count)
0
stu1 = OldboyStudent('nick', 18, 'male') print(stu1.count)
1
stu2 = OldboyStudent('sean', 17, 'male') print(stu2.count)
2
stu3 = OldboyStudent('tank', 19, 'female') print(stu3.count)
3
print(OldboyStudent.count)
3
print(stu1.name)
nick
- 由于上述修改的是类属性,类属性的count已经被修改为3,所以其他实例的count都为3
print(stu1.count)
3
print(stu2.count)
3
print(stu3.count)
3
- 由于aa是私有属性,因此stu们都会用自己私有的aa,不会用类的aa
print(stu1.__dict__)
{'name': 'nick', 'age': 18, 'sex': 'male', 'aa': 1}
print(stu2.__dict__)
{'name': 'sean', 'age': 17, 'sex': 'male', 'aa': 1}
print(stu3.__dict__)
{'name': 'tank', 'age': 19, 'sex': 'female', 'aa': 1}