blast against genomes in biopython

from Bio import Entrez, SeqIO
from Bio.Blast import NCBIXML
from Bio.Blast import NCBIWWW
result_handle = NCBIWWW.qblast("blastn","nr", "CACTTATTTAGTTAGCTTGCAACCCTGGATTTTTGTTTACTGGAGAGGCC",entrez_query='"Beutenbergia cavernae DSM 12333" [Organism]')
blast_records = NCBIXML.parse(result_handle)
    for blast_record in blast_records:
        for alignment in blast_record.alignments:
           for hsp in alignment.hsps:
               print(hsp.query[0:75] + '...')
               print(hsp.match[0:75] + '...')
               print(hsp.sbjct[0:75] + '...')

this does not give me an output, although the sequence is actually a sequence of the genome, so i must get a result. where is the error? the query is correct?