code: def test_set_item(self):
      with self.assertRaises(TypeError):
          self.row["one"] = "t"
  
      with self.assertRaises(TypeError):
          self.row["five"] = "g"
  
imports: import unittest
  from agate.mapped_sequence import MappedSequence
label_desc: Use image node_id 9 for calling the TestMappedSequence obj's underlying member method code with example usage: obj.test_set_item() without return types