code: def test_op(proxy, op):
      assert isinstance(
          op(proxy).convert("label"), hyperopt.pyll.base.Apply
      )
  
imports: import pytest
  import hyperopt.pyll.base
  from matchzoo.engine import hyper_spaces
label_desc: Use image node_id 4 for calling a global function with example usage: test_op(proxy, op) without return types