code: def sample_id(self, lon):
          ''' Return the corresponding sample
  
          Args:
              lon (int): longidute in degree
  
          Returns:
              Correponding sample
  
          '''
          if self.grid == 'WAC':
              sample = np.rint(float(self.SAMPLE_PROJECTION_OFFSET) + 1.0 +
                               (lon * np.pi / 180.0 - float(self.CENTER_LONGITUDE)) *
                               self.A_AXIS_RADIUS *
                               np.cos(self.CENTER_LATITUDE * np.pi / 180.0)
                               / (self.MAP_SCALE * 1e-3))
          else:
              sample = np.rint(float(self.SAMPLE_PROJECTION_OFFSET) + float(self.MAP_RESOLUTION)
                               * (lon - float(self.CENTER_LONGITUDE))) + 1
          return self._control_sample(samplef sample_id(self, lon):
          ''' Return the corresponding sample
  
          Args:
              lon (int): longidute in degree
  
          Returns:
              Correponding sample
  
          '''
          if self.grid == 'WAC':
              sample = np.rint(float(self.SAMPLE_PROJECTION_OFFSET) + 1.0 +
                               (lon * np.pi / 180.0 - float(self.CENTER_LONGITUDE)) *
                               self.A_AXIS_RADIUS *
                               np.cos(self.CENTER_LATITUDE * np.pi / 180.0)
                               / (self.MAP_SCALE * 1e-3))
          else:
              sample = np.rint(float(self.SAMPLE_PROJECTION_OFFSET) + float(self.MAP_RESOLUTION)
                               * (lon - float(self.CENTER_LONGITUDE))) + 1
          return self._control_sample(sample)
docs: Return the corresponding sample
  
          Args:
              lon (int): longidute in degree
  
          Returns:
              Correponding sample