code: def test_submodule(monkeypatch):
      # Create a fake module with a submodule
      name = "fakemodule"
      module = types.ModuleType(name)
      module.__version__ = "0.9.0"
      sys.modules[name] = module
      sub_name = "submodule"
      submodule = types.ModuleType(sub_name)
      setattr(module, sub_name, submodule)
      sys.modules[f"{name}.{sub_name}"] = submodule
      monkeypatch.setitem(VERSIONS, name, "1.0.0")
  
      match = "Pandas requires .*1.0.0.* of .fakemodule.*'0.9.0'"
      with pytest.raises(ImportError, match=match):
          import_dependency("fakemodule.submodule")
  
      with pytest.warns(UserWarning):
          result = import_dependency(
              "fakemodule.submodule", errors="warn"
          )
      assert result is None
  
      module.__version__ = "1.0.0"  # exact match is OK
      result = import_dependency("fakemodule.submodule")
      assert result is submodule
  
file_path: pandas-ai/tests/helpers/test_optional_dependency.py
imports: import sys
  import types
  import pytest
  from pandasai.helpers.optional import VERSIONS, import_dependency
label_desc: Use image node_id 4 for calling a global function with example usage: test_submodule(monkeypatch) without return types