Tweepy Twitter Oauth Authentication Not Returning Oauth_verifier

I am using a python library called 'tweepy' for twitter. When I try to authorize the user, twitter is supposed to redirect to a callback url with auth_token and oauth_verifier. I a

Solution 1:

Twitter only uses oauth_verifier (PINs) for desktop applications. For web applications, Twitter bypasses this and does not use it. You can re-check your application settings at http://dev.twitter.com/apps