python基础之列表

列表索引

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
print(list[0].title())

列表方法

修改元素

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list[0] = ‘first‘
print(list.title())

追加元素

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.append(‘last‘)
print(list)

插入元素

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.insert(1,‘before‘)
print(list)

删除元素

永久删除

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.insert(1,‘before‘)
del list[0]
print(list)

临时删除

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.insert(1,‘before‘)
value = list.pop()   #pop()不加参数默认删除末尾
print(list)
print(value)

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.insert(1,‘before‘)
value = list.pop(0)   #pop()加参数删除指定位置
print(list)
print(value)

list = [‘trek‘,‘cannondale‘,‘redline‘,‘specialized‘]
list.insert(1,‘before‘)
list.remove(‘trek‘)     #remove()删除指定的值
print(list)

列表排序

永久排序

cars = [‘bmw‘,‘audi‘,‘toyota‘,‘subaru‘]
cars.sort()
print(cars)

cars = [‘bmw‘,‘audi‘,‘toyota‘,‘subaru‘]
cars.sort(reverse=True)   #reverse=True代表反向排序
print(cars)

cars = [‘bmw‘,‘audi‘,‘toyota‘,‘subaru‘]
cars.reverse()   #reverse()代表反向排序
print(cars)

临时排序

cars = [‘bmw‘,‘audi‘,‘toyota‘,‘subaru‘]
print(cars)
print(sorted(cars))
print(cars)

列表长度

cars = [‘bmw‘,‘audi‘,‘toyota‘,‘subaru‘]
print(len(cars))

python基础之列表

原文：https://www.cnblogs.com/huny/p/13763597.html