old_contents: # -*- coding: utf-8 -*-
  
  try:
      import msgpack
  except ImportError:
      msgpack = None
  
  from .serializer import Serializer
  
  
  class MsgPackSerializer(Serializer):
      """
      Serializer that uses `msgpack <https://pypi.python.org/pypi/msgpack-python/>`_ representations.
  
      By default, this serializer does not support serializing custom objects.
      """
  
      def serialize(self, data):
          """
          Serialize data.
  
          :param data: The data to serialize
          :type data: mixed
  
          :rtype: str
          """
          return msgpack.packb(data, use_bin_types=True)
  
      def unserialize(self, data):
          """
          Unserialize data.
  
          :param data: The data to unserialize
          :type data: mixed
  
          :rtype: str
          """
          return msgpack.unpackb(data, encoding='utf-8')
  
new_contents: # -*- coding: utf-8 -*-
  
  try:
      import msgpack
  except ImportError:
      msgpack = None
  
  from .serializer import Serializer
  
  
  class MsgPackSerializer(Serializer):
      """
      Serializer that uses `msgpack <https://pypi.python.org/pypi/msgpack-python/>`_ representations.
  
      By default, this serializer does not support serializing custom objects.
      """
  
      def serialize(self, data):
          """
          Serialize data.
  
          :param data: The data to serialize
          :type data: mixed
  
          :rtype: str
          """
          return msgpack.packb(data, use_bin_type=True)
  
      def unserialize(self, data):
          """
          Unserialize data.
  
          :param data: The data to unserialize
          :type data: mixed
  
          :rtype: str
          """
          return msgpack.unpackb(data, encoding='utf-8')
  
subject: Fix msgpack serializer