Attribute Error

[ranebull]

I have some problem:
root@b0cfab576e2f:/CTF# python run.py check
/usr/local/lib/python2.7/dist-packages/flask_sqlalchemy/init.py:30: ExtDeprecationWarning: Importing flask.ext.sqlalchemy is deprecated, use flask_sqlalchemy instead.
from flask.ext.sqlalchemy._compat import iteritems, itervalues, xrange,
/usr/local/lib/python2.7/dist-packages/flask_sqlalchemy/init.py:30: ExtDeprecationWarning: Importing flask.ext.sqlalchemy._compat is deprecated, use flask_sqlalchemy._compat instead.
from flask.ext.sqlalchemy._compat import iteritems, itervalues, xrange,
/CTF/ctf.py:14: ExtDeprecationWarning: Importing flask.ext.mail is deprecated, use flask_mail instead.
from flask.ext.mail import Message
Traceback (most recent call last):
File "run.py", line 4, in
from ctf import app
File "/CTF/ctf.py", line 19, in
import models
File "/CTF/models.py", line 6, in
class User(UserMixin, ctf.db.Model):
AttributeError: 'module' object has no attribute 'db'

[0xbbdd]

same problem...