How to access a database initialized in a class from another class in python? -


how go implementing mainpage class?

import cgi import os import logging  google.appengine.api import users google.appengine.ext import webapp google.appengine.ext.webapp.util import run_wsgi_app google.appengine.ext import db  class greeting(db.model):  #setting database   = db.stringproperty(multiline=true)   b = db.stringproperty(multiline=true)   c = db.stringproperty(multiline=true)   d = db.stringproperty(multiline=true)  class mainpage(webapp.requesthandler):   def get(self): ##i want access content of database here defined in downloader class.  ##for example let value of greeting.a assigned alpha variable.      #entering data database class downloader(webapp.requesthandler):     def get(self):         greeting=greeting()         greeting.a=self.request.get.get('a')         greeting.b=self.request.get.get('b')         greeting.c=self.request.get.get('c')         greeting.d=self.request.get.get('d')         greeting.put()

you pass downloader object mainpage on initialization:

class mainpage(webapp.requesthandler):     def __init__(self, downloader):         self.downloader = downloader      def get(self):         self.downloader.get()

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