Script for concatenating fragemented tblastn output_not working though

gistfile1.py

from Bio.Blast import NCBIXML

input_path = '/home/edson/tblastn_results_test/Sample_output.xml'

with open(input_path) as tblastn_file:
        records = NCBIXML.parse(tblastn_file)

        for record in records:
            for alignment in record.alignments:
                hits = sorted((hsp.query_start, hsp.query_end, hsp.sbjct_start, hsp.sbjct_end, alignment.title, hsp.query, hsp.sbjct)\
                              for hsp in alignment.hsps) # sorting results according to positions
                complete_query_seq = ''
                complete_sbjct_seq =''
                for q_start, q_end, sb_start, sb_end, title, query, sbjct in hits:
                    print title
                    print 'The query starts from position: ' + str(q_start)
                    print 'The query ends at position: ' + str(q_end)
                    print 'The hit starts at position: ' + str(sb_start)
                    print 'The hit ends at position: ' + str(sb_end)
                    print 'The query is: ' + query
                    print 'The hit is: ' + sbjct
                    complete_query_seq += str(query[q_start-1:q_end]) # concatenating subsequent query/subject portions with alignments
                    complete_sbjct_seq += str(sbjct[sb_start-1:sb_end])
                print 'Complete query seq is: ' + complete_query_seq
                print 'Complete subject seq is: ' + complete_sbjct_seq