code: def _random_array(shape):
      return np.random.uniform(-1, 1, size=shape).astype(np.float32)
  
file_path: chainercv/tests/links_tests/model_tests/ssd_tests/test_multibox_coder.py
imports: import numpy
  import unittest
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links.model.ssd import MultiboxCoder
label_desc: Use image node_id 1 for calling a global function with example usage: _random_array(shape) and returns: np