code: def test_get_module_exists_submodule(self):
      import requests.sessions
  
      module = get_module("requests.sessions")
      self.assertIsNotNone(module)
      self.assertEqual(requests.sessions, module)
  
file_path: plotly.py/packages/python/plotly/plotly/tests/test_core/test_optional_imports/test_optional_imports.py
imports: import sys
  from unittest import TestCase
  from plotly.optional_imports import get_module
label_desc: Use image node_id 2 for calling the OptionalImportsTest obj's underlying member method code with example usage: obj.test_get_module_exists_submodule() without return types