code: def ones(shape, dtype=float32, ctx=_default_context):
      return _ones(shape, dtype, ctx)
  
file_path: dgl/tests/backend/__init__.py
imports: import importlib
  import os
  import sys
  import numpy
  from dgl.backend import *
  from dgl.nn import *
  from .None import backend_unittest
label_desc: Use image node_id 4 for calling a global function with example usage: ones(shape, dtype, ctx) and returns: _ones