目录
一、类和数据类型
一、类
python3统一了类与类型的概念,类就是类型
class Foo: passobj = Foo()print(type(obj))
lis = [1, 2, 3]lis2 = [4, 5, 6]print(type(lis))
- lis和lis2都是实例化的对象,因此lis使用append方法和lis2无关
lis.append(7)print(lis)[1, 2, 3, 7]print(lis2)[4,5,6]
二、解析list.append()方法
class OldboyStudent: school = 'oldboy' def __init__(self, name, age, gender): self.name = name self.age = age self.sex = gender def choose_course(self, name): print(f'{name} choosing course')stu1 = OldboyStudent('nick', 18, 'male')
stu1.choose_course(1) # OldboyStudent.choose_course(stu1, 1)
1 choosing course
OldboyStudent.choose_course(stu1, 1)
1 choosing course
lis = [1, 2, 3] # lis = list([1,2,3])print(type(lis))
<class 'list'>
lis.append(4) # list.append(lis,4)print(lis)
[1, 2, 3, 4]
list.append(lis, 5)print(lis)
[1, 2, 3, 4, 5]
说明:class OldboyStudent有两种调用方法
stu1.choose_course(1) OldboyStudent.choose_course(stu1, 1)
list也有两种调用方法
lis.append(4) list.append(lis,4)