How to convert integer str to integer in a nested list

Question

I have a nested list a:

a = [['fuzzy', '12'], ['drake', '6'], ['lebron', '23'], ['davis', '3'], ['jason', '16'], ['jon', '33'], ['jeff', '20'], ['rich', '33'], ['big', '100'], ['small', '2'], ['jack', '11'], ['queen', '12'], ['king', '13']]

I need to loop through this nested list and only change the integers strings into integers and the output should show

[['fuzzy', 12], ['drake', 6]....]

Any ideas?

Answer 1

您可以使用map功能：

a = map(lambda x:[x[0], int(x[1])], a)

Answer 2

使用列表理解，

result = [[item[0], int(item[1])] for item in a]

Answer 3

for i in range(len(a)): a[i][1] = int(a[i][1])

只需运行一个循环并用整数更改值

Answer 4

Do a for loop to run through each list, then reassign the second item in the list:

for pair in a:
   pair[1] = int(pair[1])