code: def parse_bed(bed_file):
      
  
      new_scaffolds = {}
      with open(bed_file) as bed_handle:
          for line in bed_handle:
              chrom, start, end, query, qual, strand = line.split()[:7]
              if strand == "+":
                  ori = 1
              elif strand == "-":
                  ori = -1
              else:
                  raise ValueError(
                      "Error when parsing strand "
                      "orientation: {}".format(strand)
                  )
  
              if int(qual) > 0:
                  bed_bin = [query, -2, int(start), int(end), ori]
                  try:
                      new_scaffolds[chrom].append(bed_bin)
                  except KeyError:
                      new_scaffolds[chrom] = [bed_bin]
  
      return new_scaffolds
docs: Import a BED file (where the data entries are analogous to what may be
      expected in an info_frags.txt file) and return a scaffold dictionary,
      similarly to parse_info_frags.