1、使用del语句删除元素
>>> i1 = ["a",'b','c','d']
>>> del i1[0]
>>> print(i1)
['b', 'c', 'd']
>>>
del语句将值从列表中删除后，就再也无法访问它了。
2、使用pop（）删除元素
pop（）可删除列表末尾的元素，并让你能够接着使用它。食欲弹出（pop）源自这样的类比：列表就是一个栈，而删除列表末尾的元素相当于弹出栈顶元素。
>>> i1 = ['cai','rui','headsome']
>>> i2 = i1.pop()
>>> print(i1)
['cai', 'rui']
>>> print(i2)
headsome
>>>
作用：假设列表中的摩托车是按照购买时间存储的，就可以使用方法pop（）打印一条消息，指出最后购买的是哪款摩托车：
#!/usr/bin/env python
motorcycles = ['honda','yamaha','suzuki']
last_owned = motorcycles.pop()
print("The last motorcycle i owned was a " + last_owned.title() + '.')
================================
The last motorcycle i owned was a Suzuki.
弹出列表中任何位置处的元素：
#!/usr/bin/env python
motorcycles = ['honda','yamaha','suzuki']
last_owned = motorcycles.pop(0)
print("The last motorcycle i owned was a " + last_owned.title() + '.')
========================================
The last motorcycle i owned was a Honda.
3、remove 根据值删除元素
motorcycles = ['honda','yamaha','suzuki']
motorcycles.remove('yamaha')
print(motorcycles)
====================================
['honda', 'suzuki']
注意：remove（）只删除一个指定的值。如果要删除的值可能在列表中出现多次，就需要使用循环来判断是否删除了所有的值。