storage_class to store data

storage_class.py

# -*- coding: utf-8 -*-
"""
This file contains Storage class to storage data.
"""

class Storage(dict):
     """
     A Storage object is like a dictionary except `obj.foo` can be used
     in addition to `obj['foo']`.

     >>> obj = Storage(a=1)
     >>> obj.val
     1
     >>> obj['val']
     1
     >>> obj.val = 2
     >>> obj['val']
     2
     >>> del obj.val
     >>> obj.val
     None
     """
     def __getattr__(self, key):
         try:
             return self[key]
         except KeyError:
             return None

     def __setattr__(self, key, value):
         self[key] = value

     def __delattr__(self, key):
         try:
             del self[key]
         except KeyError as error:
             raise AttributeError(error)

     def __repr__(self):
         return '<Storage ' + dict.__repr__(self) + '>'

     def __getstate__(self):
         return dict(self)

     def __setstate__(self,value):
         for k,v in value.items(): self[k]=v