main:.
+-a
¦     +-__init__.py
¦     +-aa.py
+-b
¦     +-__init__.py
¦     +-bb.py
+-cc.py

if i am in aa.py , how to import cc.py ?

this is my code ,but it is error :

from main import cc

what should i do .

thanks

updated

in normal python file (not on gae),i can use this code :

import os,sys
dirname=os.path.dirname
path=os.path.join(dirname(dirname(__file__)))
sys.path.insert(0,path)
import cc
print cc.c

but on gae , it show error :

ImportError: No module named cc