练习五十二:列表练习

有如下列表，按照要求实现每一个功能
li = ['hello','seven',['mon',['h','kelly'],'all'],123,456]
a.请输出‘Kelly’
b.请使用索引找到‘all’元素，并将其修改为‘ALL’

>>> li = ['hello','seven',['mon',['h','kelly'],'all'],123,456]
>>> li[2][1][1]
'kelly'
>>> str1 = li[2][1][1].capitalize()
>>> print(str1)
Kelly
>>> li[2][2].upper()
'ALL'