code: def list_datafiles():
      '''Get the type of the tomodir and the highest iteration to list all files,
      which will be plotted.
      '''
      is_cplx, is_fpi = td_type()
      # get the highest iteration
      it_rho = read_iter(is_fpi)
      it_phase = read_iter(False)
      # list the files
      files = ['inv/coverage.mag']
      dtype = ['cov']
      files.append(it_rho)
      dtype.append('mag')
      if is_cplx:
          files.append(it_rho.replace('mag', 'pha'))
          dtype.append('pha')
      if is_fpi:
          files.append(it_phase.replace('mag', 'pha'))
          dtype.append('pha_fpi')
  
      return files, dtypf list_datafiles():
      '''Get the type of the tomodir and the highest iteration to list all files,
      which will be plotted.
      '''
      is_cplx, is_fpi = td_type()
      # get the highest iteration
      it_rho = read_iter(is_fpi)
      it_phase = read_iter(False)
      # list the files
      files = ['inv/coverage.mag']
      dtype = ['cov']
      files.append(it_rho)
      dtype.append('mag')
      if is_cplx:
          files.append(it_rho.replace('mag', 'pha'))
          dtype.append('pha')
      if is_fpi:
          files.append(it_phase.replace('mag', 'pha'))
          dtype.append('pha_fpi')
  
      return files, dtype
docs: Get the type of the tomodir and the highest iteration to list all files,
      which will be plotted.