code: def test_update_list_make_copies_false(self):
      trace1 = Scatter(x=[1, 2, 3], y=[2, 1, 2])
      trace2 = Scatter(x=[1, 2, 3], y=[3, 2, 1])
      data = Data([trace1, trace2])
      update = dict(x=[2, 3, 4], y=[1, 2, 3], line=Line())
      data.update(update, make_copies=False)
      assert data[0]["line"] is data[1]["line"]
  
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 6 for calling the TestUpdateMethod obj's underlying member method code with example usage: obj.test_update_list_make_copies_false() without return types