StorageObj Python 3 implementation

[adrianespejo]

The current implementation of StorageObj is not efficient. In Python 3, we may change this to only have StorageDict as IStorage object, and a StorageObj would only be an element of the StorageDict.

class MailByUser(StorageDict[str,str]):
       pass

mbu = MailByUser('test.customers')
mbu['cugni'] = '[email protected]'

class Client(StorageObj):
    user_id: KEY(str)
    mail: str
    collection_name = 'test.customers'    # keyspace and table name
    # if collection_name is not set the table will be based on the name of the class

print(Client.repo['cugni'])    # prints Client("cugni","[email protected]")
# or
print(Client.find('cugni'))

pol = Client()
pol.user_id = 'pol'
pol.mail = '[email protected]'
pol.make_persistent()    # if type KEY is not set in Client a key can be specified here as a parameter
# or
Client.repo['pol'] = pol