code: def setUp(self):
      py.sign_in(
          "PlotlyImageTest",
          "786r5mecv0",
          plotly_domain="https://plotly.com",
      )
  
file_path: plotly.py/packages/python/chart-studio/chart_studio/tests/test_optional/test_matplotlylib/test_plot_mpl.py
imports: from __future__ import absolute_import
  import _plotly_utils.exceptions
  from plotly import optional_imports
  from chart_studio.plotly import plotly
  from unittest import TestCase
  import pytest
label_desc: Use image node_id 1 for calling the PlotMPLTest obj's underlying member method code with example usage: obj.setUp() without return types