code: def test_ludwig_feature_dict_with_periods():
      feature_dict = feature_utils.LudwigFeatureDict()
  
      to_module = torch.nn.Module()
  
      feature_dict.set("to.", to_module)
  
      assert feature_dict.keys() == ["to."]
      assert feature_dict.items() == [("to.", to_module)]
      assert feature_dict.get("to.") == to_module
  
file_path: ludwig/tests/ludwig/features/test_feature_utils.py
imports: import numpy
  import pytest
  import torch
  from ludwig.features import feature_utils
label_desc: Use image node_id 2 for calling a global function with example usage: test_ludwig_feature_dict_with_periods() without return types