Python Firebase issue No module named firebase_admin

I have deployed a python code in Google App Engine.In my code,tried to import firebase_admin,but it shows following error,

import firebase_adminImportError: No module named firebase_admin

hello.py

import firebase_adminfrom firebase_admin import credentialsfrom firebase_admin import db

I tried simple python code using Terminal:hello.py

import firebase_adminprint firebase_admin

Output in terminal:

~/Desktop$ python hello.py<module 'firebase_admin' from '/usr/local/lib/python2.7/dist-packages/firebase_admin/__init__.pyc'>