docs: def td_type():
      '''get type of the tomodir (complex or dc and whether fpi)
      '''
      cfg = np.genfromtxt('exe/crtomo.cfg',
                          skip_header=15,
                          dtype='str',
                          usecols=([0]))
      is_complex = False
      if cfg[0] == 'F':
          is_complex = True
      is_fpi = False
      if cfg[2] == 'T':
          is_fpi = True
  
      return is_complex, is_fpi