code: def parse_subjects_list(filepath, datadir='', split=':', labelsf=None):
      
      labels = []
      subjs  = []
  
      if datadir:
          datadir += op.sep
  
      with open(filepath, 'r') as f:
          for s in f:
              line = s.strip().split(split)
              if len(line) == 2:
                  labels.append(np.float(line[1]))
                  subjf = line[0].strip()
              else:
                  subjf = line.strip()
  
              if not op.isabs(subjf):
                  subjs.append(datadir + subjf)
              else:
                  subjs.append(subjf)
  
  
      if labelsf is not None:
          labels = np.loadtxt(labelsf)
  
      return [labels, subjs]
docs: Parses a file with a list of: <subject_file>:<subject_class_label>.
  
      Parameters
      ----------
      filepath: str
      Path to file with a list of: <subject_file>:<subject_class_label>.
      Where ':' can be any split character
  
      datadir: str
      String to be path prefix of each line of the fname content,
      only in case the lines are relative file paths.
  
      split: str
      Split character for each line
  
      labelsf: str
      Path to file with a list of the labels if it is not included in
      fname. It will overwrite the labels from fname.
  
      Returns
      -------
      [labels, subjs] where labels is a list of labels and subjs a list of
      filepaths