How to sort a list of lists by a specific index of the inner list?

Question

I have a list of lists. For example,

[
[0,1,\'f\'],
[4,2,\'t\'],
[9,4,\'afsd\']
]

If I wanted to sort the outer list by the string field o

Answer 1

Sorting a Multidimensional Array execute here

arr=[[2,1],[1,2],[3,5],[4,5],[3,1],[5,2],[3,8],[1,9],[1,3]]



arr.sort(key=lambda x:x[0])
la=set([i[0] for i in Points])

for i in la:
    tempres=list()
    for j in arr:
        if j[0]==i:
            tempres.append(j[1])

    for j in sorted(tempres,reverse=True):
        print(i,j)