code: def test_signature_parsing(self, signature):
      i, o = cupy._core._gufuncs._parse_gufunc_signature(signature[0])
      assert i == signature[1]
      assert o == signature[2]
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy._core._gufuncs import _GUFunc
label_desc: Use image node_id 1 for calling the TestGUFuncSignature obj's underlying member method code with example usage: obj.test_signature_parsing(signature) without return types