code: def test_install_reqs():
      f = Flow().add(
          install_requirements=True,
          uses=os.path.join(
              os.path.join(cur_dir, "exec"), "config.yml"
          ),
      )
      with f:
          resp = f.post(on="/", inputs=DocumentArray.empty(2))
  
      assert len(resp) == 2
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_install_reqs() without return types