code: def test_bad_unicode_environment_variables(self):
      filename = (
          self.FIXTURES_ROOT / "simple_tagger" / "experiment.json"
      )
      os.environ["BAD_ENVIRONMENT_VARIABLE"] = "\udce2"
      Params.from_file(filename)
      del os.environ["BAD_ENVIRONMENT_VARIABLE"]
  
imports: import json
  import os
  import re
  from collections import OrderedDict
  import pytest
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.params import infer_and_cast, Params, remove_keys_from_params, with_overrides
  from allennlp.common.testing import AllenNlpTestCase
label_desc: Use image node_id 3 for calling the TestParams obj's underlying member method code with example usage: obj.test_bad_unicode_environment_variables() without return types