code: def ref_bcast(x_data_list, src):
      results = []
      for x_data in x_data_list:
          results.append(x_data * (src + 1))
      return results
  
imports: import pytest
  import nnabla
  import nnabla.parametric_functions
  import numpy
  from nnabla.testing import assert_allclose
label_desc: Use image node_id 1 for calling a global function with example usage: ref_bcast(x_data_list, src) and returns: results