code: def std_round(x):
      return np.sign(x) * np.floor(np.abs(x) + 0.5)
  
file_path: nnabla/python/test/function/test_quantize_linear.py
imports: import pytest
  import numpy
  import nnabla.functions
  from nbla_test_utils import list_context
label_desc: Use image node_id 1 for calling a global function with example usage: std_round(x) and returns: unknown