如何在Python中执行此操作（Perl代码段对2D数组进行排序）

Question

I am trying to write this snippet in Python, to do a 2D array sort. Basically, I have an array of arrays, and I need to sort it by the second element first, then by the first

can anyone help out?

my @result = sort { $a->[0] <=> $b->[0] || $a->[1] <=> $b->[1] } @all

Answer 1

Like so:

from operator import itemgetter

all = [ [2,2],[2,1],[1,2],[1,1] ]
result = sorted(all, key=itemgetter(0,1))

Answer 2

def my_sort(a, b):

    return cmp(a[0], b[0]) or cmp(a[1], b[1]);


AnArray = [ [3, 3], [2, 6], [2, 2], [0, 4], [0, 1] ];

print AnArray
print sorted(AnArray, cmp=my_sort)