function for tracking django queries

def track_queries(action, cache=[0]):
    from django.db import connection

    if action == 'start':
        cache[0] = len(connection.queries)

    if action == 'stop':
        print '--'
        for item in connection.queries[cache[0]:]:
            print item['time'], item['sql']
        print 'Query count: %d' % (len(connection.queries) - cache[0])