old_contents: # Python Security Project (PySec) and its related class files.
  #
  # PySec is a set of tools for secure application development under Linux
  #
  # Copyright 2014 PySec development team
  #
  # 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.
  #
  # -*- coding: ascii -*-
  from types import DictType
  
  
  __all__ = 'KV', 'SoftKV', 'HardKV', 'HybridKV'
  
  
  
  class KV(DictType):
      pass
  
  
  class SoftKV(KV):
      pass
  
  
  class HardKV(KV):
  
      def size(self):
          """Get the amount of occupied memory"""
          raise NotImplementedError
  
      def close(self):
          """Close persistent object"""
          raise NotImplementedError
  
  
  _NO_KEY = object()
  
  
  class HybridKV(HardKV, SoftKV):
  
      def __init__(self, soft_cls, hard_cls, soft_args=(), soft_kwargs=None,
                   hard_args=(), hard_kwargs=None):
          self.soft = soft_cls(*soft_args,
                               **({} if soft_kwargs is None else soft_kwargs))
          self.hard = hard_cls(*hard_args,
                               **({} if hard_kwargs is None else hard_kwargs))
  
      def refresh(self):
          raise NotImplementedError
  
      def get(self, key, default=None):
          value = self.soft.get(key, _NO_KEY)
          return self.hard.get(key, default) if value is _NO_KEY else value
  
      def __getitem__(self, key):
          value = self.soft.get(key, _NO_KEY)
          return self.hard.get[key] if value is _NO_KEY else value
  
new_contents: # Python Security Project (PySec) and its related class files.
  #
  # PySec is a set of tools for secure application development under Linux
  #
  # Copyright 2014 PySec development team
  #
  # 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.
  #
  # -*- coding: ascii -*-
  from types import DictType
  
  
  __all__ = 'KV', 'SoftKV', 'HardKV', 'HybridKV'
  
  
  
  class KV(DictType):
      pass
  
  
  class SoftKV(KV):
      pass
  
  
  class HardKV(KV):
  
      def size(self):
          """Get the amount of occupied memory"""
          raise NotImplementedError
  
      def close(self):
          """Close persistent object"""
          raise NotImplementedError
  
      def __enter__(self):
          return self
  
      def __exit__(self, exc_type, exc_value, traceback):
          self.close()
          return 0
  
  
  _NO_KEY = object()
  
  
  class HybridKV(HardKV, SoftKV):
  
      def __init__(self, soft_cls, hard_cls, soft_args=(), soft_kwargs=None,
                   hard_args=(), hard_kwargs=None):
          self.soft = soft_cls(*soft_args,
                               **({} if soft_kwargs is None else soft_kwargs))
          self.hard = hard_cls(*hard_args,
                               **({} if hard_kwargs is None else hard_kwargs))
  
      def refresh(self):
          raise NotImplementedError
  
      def get(self, key, default=None):
          value = self.soft.get(key, _NO_KEY)
          return self.hard.get(key, default) if value is _NO_KEY else value
  
      def __getitem__(self, key):
          value = self.soft.get(key, _NO_KEY)
          return self.hard.get[key] if value is _NO_KEY else value
  
subject: add context methods