code: def test_norm_forward_backward(
      seed, p, axis, keepdims, inshape, ctx, func_name
  ):
      func = F.norm
      ref_func = ref_norm
      rng = np.random.RandomState(seed)
      inputs = [rng.randn(*inshape).astype(np.float32)]
      function_tester(
          rng,
          func,
          ref_func,
          inputs,
          func_args=[p, axis],
          func_kwargs=dict(keepdims=keepdims),
          ctx=ctx,
          func_name=func_name,
          atol_b=6e-3,
      )
  
imports: import pytest
  import numpy
  import nnabla.functions
  from nbla_test_utils import function_tester, list_context
label_desc: Use image node_id 2 for calling a global function with example usage: test_norm_forward_backward(seed, p, axis, keepdims, inshape, ctx, func_name) without return types