code: def tearDown(self):
      try:
          del pio.templates["test_template"]
      except KeyError:
          pass
  
      pio.templates.default = "plotly"
  
imports: import copy
  from unittest import TestCase
  import pytest
  import plotly.io
  import plotly.graph_objs
  from plotly.tests.utils import TestCaseNoTemplate
label_desc: Use image node_id 2 for calling the TemplateTest obj's underlying member method code with example usage: obj.tearDown() without return types