如何计算python列表中单独列表中的数字？

Question

如何计算 3 出现在列表中的次数，例如[[1,2,3,4],[2,3,4,5],[5,6,7,5]]输出应该类似于[1,1,0]

Answer 1

You can use the method list.count(element) :

my_lists = [[1,2,3,4], [2,3,4,5], [5,6,7,5]]
[l.count(3) for l in my_lists]
>> [1, 1, 0]