code: def _create_symmetric_matrix(self, xp, n, dtype):
      if dtype == numpy.complex128:
          f_dtype = numpy.float64
      elif dtype == numpy.complex64:
          f_dtype = numpy.float32
      else:
          f_dtype = dtype
      a = testing.shaped_random((n, n), xp, f_dtype, scale=1)
      a = a + a.T + xp.eye(n, dtype=f_dtype) * n
      if dtype in (numpy.complex64, numpy.complex128):
          b = testing.shaped_random((n, n), xp, f_dtype, scale=1)
          b = b - b.T
          a = a + 1j * b
      return a
  
file_path: cupy/tests/cupyx_tests/linalg_tests/test_solve.py
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy.cuda import runtime
  from cupyx import cusolver
  from cupy import testing
  import cupyx
label_desc: Use image node_id 2 for calling the TestInvh obj's underlying member method code with example usage: obj._create_symmetric_matrix(xp, n, dtype) and returns: a