insert() 可在列表的任何位置添加新元素
motorcycles = ['honda', 'yamaha', 'suzuki']
motorcycles.insert(0, 'ducati')
print(motorcycles)
['ducati', 'honda', 'yamaha', 'suzuki']
如果知道要删除的元素在列表中的位置，可使用 del 语句。
motorcycles = ['honda', 'yamaha', 'suzuki']
del motorcycles[0]
print(motorcycles)
['yamaha', 'suzuki']
pop() 可删除列表末尾的元素，并让你能够接着使用它
motorcycles = ['honda', 'yamaha', 'suzuki']
print(motorcycles)
popped_motorcycle = motorcycles.pop()
print(motorcycles)
print(popped_motorcycle)
['honda', 'yamaha', 'suzuki']
['honda', 'yamaha']
suzuki
