class_docstr: Test Query params commands APIs.
code: def test_set_query_params_empty_str(self):
      empty_str_params = dict(x=[""])
      st.experimental_set_query_params(**empty_str_params)
      params_get = st.experimental_get_query_params()
      self.assertEqual(params_get, empty_str_params)
  
file_path: streamlit/lib/tests/streamlit/commands/experimental_query_params_test.py
imports: import streamlit
  from streamlit.errors import StreamlitAPIException
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 4 for calling the QueryParamsAPITest obj's underlying member method code with example usage: obj.test_set_query_params_empty_str() without return types