code: def _signed_counterpart(dtype):
      return numpy.dtype(numpy.dtype(dtype).char.lower()).type
  
imports: import functools
  import inspect
  import os
  import random
  from typing import Tuple, Type
  import traceback
  import unittest
  import warnings
  import numpy
  import cupy
  from cupy.testing import _array
  from cupy.testing import _parameterized
  import cupyx
  import cupyx.scipy.sparse
  from cupy.testing._pytest_impl import is_available
label_desc: Use image node_id 9 for calling a global function with example usage: _signed_counterpart(dtype) and returns: numpy