day005
# -*- coding:utf-8 -*- # @FileName :practise002.py # @Time :2022-06-02 9:34 # @Author :Mr.KGG """ 列表删除操作list 删除 """ area=["xianggang","shanghai","xinjiang","sichuan","taiwan","shandong","fujian","hebei","guangdong","tianjing"] #方法一:根据元素删除 area.remove("xianggang") #area.remove("xiang")可以删在列表内部的,不能删除列表内不存在的内容 print(area) #方法二:根据定位删除 area=["xianggang","shanghai","xinjiang","sichuan","taiwan","shandong","fujian","hebei","guangdong","tianjing"] del area[0]#删除第一个元素 print(area) # del area[:]#删除所有元素,不对数据进行拷贝 area=["xianggang","shanghai","xinjiang","sichuan","taiwan","shandong","fujian","hebei","guangdong","tianjing"] del area[0:2:1] print(area) """ 练习 """ plants=["水星","金星","火星","木星"] plants.insert(2,"地球") print(plants) # plants.extend(["土星","天王星","海王星"])#extend()函数后面是列表 # print(plants) plants2=["土星","天王星","海王星"] for item in plants2: plants.append(item) #append()函数一次只能追加一个函数,区别extend() print(plants) print(plants[0]) print(plants[-1]) print(plants[0:2:1]) plants.remove("海王星") # plants=["水星","金星","火星","木星"] # del plants[3] # print(plants) plants=["水星","金星","火星","木星"] for i in range(len(plants)-1,-1,-1): print(plants[i])