python中列表的基本操作

#encoding:utf-8# 访问列表元素print("\n访问列表元素：")bicycles = ['terk', 'cannonddale', 'redline', 'specialized']print(bicycles)print(bicycles[0])print(bicycles[3])print(bicycles[-1])     #输出最后一个元素print(bicycles[-2])     #输出倒数第二个元素,以此类推#在列表的末端添加元素print("\n在列表的末端添加元素：")motorcycles = ['honda', 'yamaha', 'suzuki']motorcycles.append('ducati')print(motorcycles)#在列表中插入元素print("\n在列表中插入元素：")motorcycles.insert(0, 'shihao')print(motorcycles)#在列表中删除元素print("\n在列表中删除元素;")del motorcycles[0]print(motorcycles)#弹出列表尾部的元素print("\n出列表尾部的元素:")pop_end = motorcycles.pop()print(motorcycles)print(pop_end)#弹出任意位置的元素print("\n弹出任意位置的元素；")pop_value = motorcycles.pop(1)print(motorcycles)print(pop_value)#根据值删除元素print("\n根据值删除元素：")motorcycles.remove('honda')print(motorcycles)#使用方法sort对列表进行永久性排序print("\n使用方法sort对列表进行永久性排序：")cars = ['bmw', 'audi', 'toyota', 'subaru']cars.sort()     # 按字母排序print(cars)#按照字母顺序相反的永久性排序print("按照字母顺序相反的永久性排序:")cars.sort(reverse = True)print(cars)#使用函数sorted（）对列表进行临时排序print("\n使用函数sorted（）对列表进行临时排序:")print(sorted(cars))     #正序print(sorted(cars, reverse=True))   #逆序print("\n永久性反转列表的排列顺序：")cars.reverse()print(cars)print("\n确定列表的长度:")print(len(cars))print("\n用for循环来打印列表:")magicians = ['alice', 'david', 'carolina']for temp in magicians:    print(temp)print("使用函数range():")for value in range(1, 5):    print(value)    #打印 1 2 3 4#将一系列数字转成列表numbers = list(range(1, 5))print(numbers)# ** 表示乘方运算squares = []for value in range(1, 5):    squares.append(value**2)print(squares)#简单的统计计算print("\n简单的统计运算")print(min(squares)) #求最小值print(max(squares)) #求最大值print(sum(squares)) #求和#列表解析squares = [value**2 for value in range(1, 11)]print(squares)#使用列表的一部分print("\n\n\n切片:")players = ['charles', 'martina', 'michael', 'florence', 'eli']print(players[1:3])print("\n输出所有队员:")print(players[0:])print("\n输出最后三名队员:")print(players[-3:])#复制整个列表print("\n错误的复制方法：")my_foods = ['pizza', 'falafel', 'carrot cake']friend_foods = my_foodsmy_foods.append('cannoli')print(my_foods)print(friend_foods)print("\n正确的复制方法:")friend_foods = my_foods[:]  #省略起始索引和终止索引my_foods.append('ice cream')print(my_foods)print(friend_foods)#元组：不可变的列表称为元组print("\n\n\n元组：")#定义元组edrtgrjjdimensions = (200, 50)  #用小括号print(dimensions[0])print(dimensions[1])#虽然元组的元素不能修改，但可以重新定义整个元组dimensions = (400, 100)for dimension in dimensions:    print(dimension)