Hi,
I'm working with numerical array and I'm a little lost on a particular
sorting of one of them. In particular I have an array like
a = array([[8,4,1],[2,0,9]])
and I need to sort it using only the first column as reference but
keeping the lines together so to obtain
array([[2, 0, 9],
[8, 4, 1]])
Any help?
Thanks