code: def test_not_number(self):
      with self.assertRaises(ValueError) as cm:
          geojson.MultiPoint([[1, "?"]], validate=False)
  
      self.assertIn("is not a JSON compliant number", str(cm.exception))
  
imports: import unittest
  import geojson
label_desc: Use image node_id 6 for calling the TestValidationGeometry obj's underlying member method code with example usage: obj.test_not_number() without return types