old_contents: # Copyright 2017 The TensorFlow Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Miscellaneous utilities that don't fit anywhere else."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import sys
  
  import six
  
  
  def deprecated_py2_support(module_name):
    if six.PY2:
      legacy_module = __import__(module_name + '_deprecated_py2')
      current_module = sys.modules[module_name]
      current_module.__dict__.update({
          k: v
          for k, v in legacy_module.__dict__.items()
          if not k.startswith('__')
      })
  
new_contents: # Copyright 2017 The TensorFlow Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Miscellaneous utilities that don't fit anywhere else."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import importlib
  import sys
  import types
  
  import six
  
  
  class BasicRef(object):
    """This shim emulates the nonlocal keyword in Py2-compatible source."""
  
    def __init__(self, init_value):
      self.value = init_value
  
  
  def deprecated_py2_support(module_name):
    """Swaps calling module with a Py2-specific implementation. Noop in Py3."""
    if six.PY2:
      legacy_module = importlib.import_module(module_name + '_deprecated_py2')
      current_module = sys.modules[module_name]
      for name, target_val in legacy_module.__dict__.items():
        if isinstance(target_val, types.FunctionType):
          replacement = types.FunctionType(
              target_val.__code__, current_module.__dict__, target_val.__name__,
              target_val.__defaults__, target_val.__closure__)
          current_module.__dict__[name] = replacement
  
subject: Fix compat_util to properly import the fallback module, and include a helper that can emulate `nonlocal`.