[Biopython] NCBIXML: 'generator' objecthas no attribute 'alignments'

[Mic]

Hi,
The following code (BioPython 1.61, Blast+ 2.2.26):

from Bio.Blast import NCBIXML

with open("test/X.xml") as bf:
    blast_records = NCBIXML.parse(bf)

    for blast_record in blast_records:
        for alignment in blast_records.alignments:
            for hsp in alignment.hsps:
                if hsp.expect < 0.04:
                    print '****Alignment****'
                    print 'sequence:', alignment.title
                    print 'length:', alignment.length
                    print 'e value:', hsp.expect
                    print hsp.query[0:75] + '...'
                    print hsp.match[0:75] + '...'
                    print hsp.sbjct[0:75] + '...'

caused the following error:
$ python parseBlastXML.py
Traceback (most recent call last):
  File "parseBlastXML.py", line 8, in <module>
    for alignment in blast_records.alignments:
AttributeError: 'generator' object has no attribute 'alignments'

What did I do wrong?

Thank you in advance.

Mic