docs: def txt_read_out(self):
          """Read out txt file.
  
          Takes the output of :class:`gwsnrcalc.genconutils.genprocess.GenProcess`
          and reads it out to a txt file.
  
          """
  
          header = '#Generated SNR Out\n'
          header += '#Generator by: Michael Katz\n'
          header += '#Date/Time: {}\n'.format(datetime.datetime.now())
  
          for which in ['x', 'y']:
              header += '#' + which + 'val_name: {}\n'.format(getattr(self, which + 'val_name'))
              header += '#num_' + which + '_pts: {}\n'.format(getattr(self, 'num_' + which))
  
          ecc = 'eccentricity' in self.__dict__
          if ecc:
              name_list = ['observation_time', 'start_frequency', 'start_separation'
                           'eccentricity']
          else:
              name_list = ['spin_1', 'spin_2', 'spin', 'end_time']
  
          name_list += ['total_mass', 'mass_ratio', 'start_time', 'luminosity_distance',
                        'comoving_distance', 'redshift']
  
          for name in name_list:
              if name != self.xval_name and name != self.yval_name:
                  try:
                      getattr(self, name)
                      header += '#{}: {}\n'.format(name, getattr(self, name))
                  except AttributeError:
                      pass
  
          if self.added_note != '':
              header += '#Added note: ' + self.added_note + '\n'
          else:
              header += '#Added note: None\n'
  
          header += '#--------------------\n'
  
          header += self.x_col_name + '\t'
  
          header += self.y_col_name + '\t'
  
          for key in self.output_dict.keys():
              header += key + '\t'
  
          # read out x,y and the data
          x_and_y = np.asarray([self.xvals, self.yvals])
          snr_out = np.asarray([self.output_dict[key] for key in self.output_dict.keys()]).T
  
          data_out = np.concatenate([x_and_y.T, snr_out], axis=1)
  
          np.savetxt(self.WORKING_DIRECTORY + '/' + self.output_file_name,
                     data_out, delimiter='\t', header=header, comments='')
          return