倒序切片求详解

Question

>>> L = ['Adam', 'Lisa', 'Bart', 'Paul']

>>> L[-2:]
['Bart', 'Paul']

>>> L[:-2]
['Adam', 'Lisa']

>>> L[-3:-1]
['Lisa', 'Bart']

>>> L[-4:-1:2]
['Adam', 'Bart']
看不懂这个[-2:]  它-2是Bart，-1为结束索引，不包含该索引的值，为啥结果还有‘paul’

Answer 1

不赞同，如果是[-2:4]那么结果应该-2 -1 1 2 3 即是‘Bart'，‘Paul'，'Adam'，'Lisa’，‘Bart'

Answer 2

L[-2:]等价于L[-2:4]，而不是等价于L[-2:-1]