code: def arange(start, stop, dtype=int64, ctx=None):
      return _arange(
          start,
          stop,
          dtype,
          ctx if ctx is not None else _default_context,
      )
  
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 7 for calling a global function with example usage: arange(start, stop, dtype, ctx) and returns: _arange