code: def test_norm_double_backward(
      seed, p, axis, keepdims, inshape, ctx, func_name
  ):
      from nbla_test_utils import backward_function_tester
  
      rng = np.random.RandomState(seed)
      inputs = [rng.randn(*inshape).astype(np.float32)]
      backward_function_tester(
          rng,
          F.norm,
          inputs=inputs,
          func_args=[p, axis, keepdims],
          ctx=ctx,
      )
  
imports: import pytest
  import numpy
  import nnabla.functions
  from nbla_test_utils import function_tester, list_context
label_desc: Use image node_id 3 for calling a global function with example usage: test_norm_double_backward(seed, p, axis, keepdims, inshape, ctx, func_name) without return types