code: def _make_data_default(shape, dtype):
      x = numpy.random.uniform(-1, 1, shape).astype(dtype, copy=False)
      gy = numpy.random.uniform(-1, 1, shape).astype(dtype, copy=False)
      ggx = numpy.random.uniform(-1, 1, shape).astype(dtype, copy=False)
      return x, gy, ggx
  
file_path: chainer/chainer/testing/unary_math_function_test.py
imports: import unittest
  import warnings
  import numpy
  from chainer.backends import cuda
  from chainer import function
  from chainer import functions
  from chainer import variable
label_desc: Use image node_id 5 for calling a global function with example usage: _make_data_default(shape, dtype) and returns: x,  gy,  ggx