code: def test_update_dict(self):
      title = "this"
      fig = Figure()
      update_res1 = fig.update(layout=Layout(title=title))
      assert fig == Figure(layout=Layout(title=title))
      update_res2 = fig["layout"].update(xaxis=XAxis())
      assert fig == Figure(layout=Layout(title=title, xaxis=XAxis()))
      assert update_res1 is fig
      assert update_res2 is fig.layout
  
file_path: plotly.py/packages/python/plotly/plotly/tests/test_core/test_graph_objs/test_update.py
imports: from unittest import skip
  import plotly.graph_objs
  from plotly.graph_objs import Data, Figure, Layout, Line, Scatter, scatter, XAxis
  from plotly.tests.utils import strip_dict_params
  from unittest import TestCase
label_desc: Use image node_id 2 for calling the TestUpdateMethod obj's underlying member method code with example usage: obj.test_update_dict() without return types