code: def get_name_and_checksum(checksums, end):
      
      for entry in checksums:
          if not entry['file'].endswith(end):
              # wrong file
              continue
          # workaround for ..cds_from_genomic.fna.gz and ..rna_from_genomic.fna.gz also
          # ending in _genomic.fna.gz, causing bogus matches for the plain fasta
          if '_from_' not in end and '_from_' in entry['file']:
              # still the wrong file
              continue
          filename = entry['file']
          expected_checksum = entry['checksum']
          return filename, expected_checksum
      raise ValueError('No entry for file ending in {!r}'.format(end))
docs: Extract a full filename and checksum from the checksums list for a file ending in given end.