#  coding=utf-8 # 1 list-列表 的用法students = [1,2,3] a = 5classmates = [students*2,[1,1,1,1],[1,1,1,1]]#list的乘法是数组的线性扩大classmates.append(‘test‘ )         #list的附加classmates.extend(students)        #迭代扩展listprint(classmates.index(‘test‘,2))  #list返回制定字符的第一个索引未知classmates.insert(1, 22)           #list插入classmates.pop(2)                  #list项的删除classmates[1] = ‘new item‘         #list项的 赋值print(classmates )print(classmates[0][1])            #多维数组调用# 2 tuple-元组的用法，元组的值不可变IDcode = (1000,1001,1002)          #定义多元素元组name = (‘Tom‘,)                    #定义单元素元组ID_Name = ([1000,‘Tom‘],(1001,‘John‘),1002)  #定义多维元组，包含元组和list，其中list指向的值可改，元组的不可ID_Name[0][1]=1002print (ID_Name)#3 Dict-数据字典,list不可作为key,但可以作为valuesalary = {‘Max‘:1001,‘Rachel‘:20001,"Jim111":14000}print(salary[‘Max‘])salary[‘Max‘] = 2000print(salary[‘Max‘])print(salary.pop(‘Jim‘,‘no Jim‘))print(salary.get(‘Rachel‘,-1))print(salary)value = [1,2]salary[‘Max‘] = valueprint(salary)#4 set-只有key，没有value,set，Dict的key都不允许可变对象，比如list，只能是字符串或者整数这些不变对象set1 = set([1,2,3])set2 = set([2,3,‘a‘])set1.add(4 )set1.remove(2)s =set([‘sdf‘,3])print(set1)print(set1&set2,set1|set2)print(set2)#几个函数sort replacedef f(x):    return -ord(x)a1 = [‘c‘, ‘b‘, ‘a‘]a2 = ‘sdf‘b=a2.replace(‘s‘, ‘a‘)a1.sort(key=f, reverse=False)print("a is:",a,"\na2 is :",a2,"\nb is",b)