code: def unmarshall_value(self, value):
          
          value = str(value)
          if self.escapeValues:
              value = value.decode('hex')
          if self.compressValues:
              value = zlib.decompress(value)
          value = pickle.loads(value)
          return value
docs: Unmarshalls a Crash object read from the database.
  
          @type  value: str
          @param value: Object to convert.
  
          @rtype:  L{Crash}
          @return: Converted object.