Modified postgresql backend

Hello,

I need to create my own modified backend based on postgresql database backend, which use my wrapper for psycopg2 driver.
I tried to simply subclass django.db.backends.postgresql.DatabaseWrapper and redefine DatabaseWrapper.Database class member, but faced the fact that inside the class the <module>.Database member is used (in get_new_connection and is_usable methods) instead of self.Database.

I think, this is bug, isn't it?
I simply copy-pasted those two methods into my subclass and added self. , however, I think, this should be fixed in the library:

Here is my db.backends.my_postgresql.base file content:
####################################################
from django.db.backends.postgresql_psycopg2.base import *
from db.drivers import my_psycopg2

class DatabaseWrapper(DatabaseWrapper):
    Database = my_psycopg2

    def get_new_connection(self, conn_params):
        connection = self.Database.connect(**conn_params) # here I added 'self.'
        ...

####################################################

--
Alexander

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