code: def _galaxy_loc_iter(loc_file, galaxy_dt, need_remap=False):
      
      if "column" in galaxy_dt:
          dbkey_i = galaxy_dt["column"].index("dbkey")
          path_i = galaxy_dt["column"].index("path")
      else:
          dbkey_i = None
      if os.path.exists(loc_file):
          with open(loc_file) as in_handle:
              for line in in_handle:
                  if line.strip() and not line.startswith("#"):
                      parts = [x.strip() for x in line.strip().split("\t")]
                      # Detect and report spaces instead of tabs
                      if len(parts) == 1:
                          parts = [x.strip() for x in line.strip().split(" ") if x.strip()]
                          if len(parts) > 1:
                              raise IOError("Galaxy location file uses spaces instead of "
                                            "tabs to separate fields: %s" % loc_file)
                      if dbkey_i is not None and not need_remap:
                          dbkey = parts[dbkey_i]
                          cur_ref = parts[path_i]
                      else:
                          if parts[0] == "index":
                              parts = parts[1:]
                          dbkey = parts[0]
                          cur_ref = parts[-1]
                      yield (dbkey, cur_ref)
docs: Iterator returning genome build and references from Galaxy *.loc file.