其他操作

lst = [["张艺谋", "冯小刚", "陈凯歌"], ["李安", "王家卫", "王晶"], ["周杰伦",["abc", "alex_wusir", ["胡辣汤", "c"]], "风扇哥"]]
# print(lst[1][1][2])

# 把王晶换成"贾樟柯"

# lst[1][2] = "贾樟柯"
# print(lst)
# $$$$$$$
# 降维操作 ["哈哈", "hehe", "houhou"] 一维  [[1,2,3], [12,4,5], [6,7,8]] 二维
# 数数
lst[2][1][1] = lst[2][1][1].replace("_", "$")
print(lst)