code: def test_valid_arg_dict(self):
      m = go.scatter.Marker(dict(color="green"))
      self.assertEqual(m.to_plotly_json(), {"color": "green"})
  
file_path: plotly.py/packages/python/plotly/plotly/tests/test_core/test_graph_objs/test_constructor.py
imports: from unittest import TestCase
  import plotly.graph_objs
  import pytest
label_desc: Use image node_id 2 for calling the TestGraphObjConstructor obj's underlying member method code with example usage: obj.test_valid_arg_dict() without return types