Looking for better way to iterate through nodes

Currently I am doing

results = swis.query(sql_query)

in order to populate a list of nodes depending on which SWQL query I am using.  I suppose I don't fully understand the syntax, but I am looping through this list by doing:

for x in xrange(10000):  uri = results['results'][x][IP_Address]  swis.update(....)

I would like to have a better way to iterate through this list, but I don't fully understand how the list is generated and what results['results'][x][IP_Address] is doing.  I'd like some help understanding this further in order to hopefully come up with a cleaner way to iterate through the results list.