[Tutor] IP sorting
Thu, 27 Dec 2001 12:25:06 -0800 (PST)
On Thu, 27 Dec 2001, Grimmtooth wrote:
> Okay, then plan 'B'. Instead of a simple > < comparison, use a function to
> compare and have the function return a value based on a custom comparison
> where it first compares the TLD then the actual address octets.
You'll like this one: Python's sort() function works very similarly to C's
qsort() --- we can give sort() a 'comparison function' to make the sort do
things our way.
Once we have something like your compare() function:
> def compare(a,b)
> for j in range(1,4): # assuming element 0 is the TLD and the
> # remainder are the octets
> if int(a[j]) > int(b[j]: # if we're sorting ascending, we need to swap
> elif int(a[j]) < int(b[j]: # No need to swap, but don't continue
Python can use this to do the sort: