code: def test_not_sequence(self):
      with self.assertRaises(ValueError) as cm:
          geojson.MultiPoint([5], validate=True)
  
      self.assertIn("each position must be a list", str(cm.exception))
  
imports: import unittest
  import geojson
label_desc: Use image node_id 5 for calling the TestValidationGeometry obj's underlying member method code with example usage: obj.test_not_sequence() without return types