Problem with the sort() function

[clementine]

Hi,

I have an array of arrays in the form of 
list = [[3,'fork',0.3,1],[2,'fork,0.1,2],[3,'exec',0.2,2]]

The in-built sort(),list.sort() sorts on the first element, if the first
elts are equal then it sorts on the second elt and so on...But i really
dont want to search on the second elt if the first elts are equal...the
1-D lists shud be left in the same position i.e. i want the sorted list to
be [[2,'fork',0.1,2],[3,'fork,0.3,1],[3,'exec',0.2,2]] and not
[[2,'fork',0.1,2],[3,'exec',0.2,2],[3,'fork,0.3,1]].

I tried the following code:

def mysort(x,y):
    return x[0]-y[0]

list.sort(mysort)

This somehow seems to work for a small subset of my input...but not for my
real input which has more than 2000 sub-lists(and so obviously i cant trace
each pass..). Can someone tell me what i'm missing?