code: def arg_scopes(l):
      for x in l:
          x.__enter__()
      yield
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
  import warnings
  from contextlib import contextmanager
  from .version_utils import tf_later_than
label_desc: Use image node_id 21 for calling a global function with example usage: arg_scopes(l) without return types