code: def imputer_error_when_dictionary_value_is_string():
      with pytest.raises(ValueError):
          ArbitraryNumberImputer(
              imputer_dict={"Age": "arbitrary_number"}
          )
  
file_path: feature_engine/tests/test_imputation/test_arbitrary_number_imputer.py
imports: import pandas
  import pytest
  from feature_engine.imputation import ArbitraryNumberImputer
label_desc: Use image node_id 5 for calling a global function with example usage: imputer_error_when_dictionary_value_is_string() without return types