python - Remove quotes from second items in nested list -

i need remove quotes second items in nested list. example, change:

a = [['first', '41'], ['second', '0'], ['third', '12']] 

to:

[['first', 41], ['second', 0], ['third', 12]] 

i tried

[map(int, [n[1]]) n in a] [[41], [0], [12], [0], [45], [17], [3], [10], [1], [19], [98], [0]] 

but removes first element. appreciated.

you can as:

a = [['first', '41'], ['second', '0'], ['third', '12']] = [[i[0], int(i[1])]for in a]  >>> print [['first', 41], ['second', 0], ['third', 12]]