Write python script that retrieve Instagram and Twitter OAuth access token

I need someone to quickly write 2 python scripts (will be similar) which are given your normal Instagram/Twitter credentials, would produce the OAuth access token. For example, "normal credentials" for Instagram are client id, client secret, and perhaps login/password of the admin user who manages the account. With these credentials I cannot perform some user-related calls which I need to do against the client that I am managing. They can only be performed with access token which according to documentation has to be retrieved via a set of manual steps. Similar situation is for Twitter - there is an application-only login, which is restricted. I need user-level login, which is OAuth. The idea is similar in both cases - OAuth presents the real user with a form to enter their credentials (which you can assume I have), and then redirects back to the "application" with the token after a 3-step process. It should be possible to write the code which "fills the form" (just does HTTP POST with cookies/hidden values as sent by Instagram/Twitter), and then retrieves the redirect URL which contains the access token as one of the parameters. There is an example of this in PHP on Stackoverflow (not sure if it's working but the idea is the same): [login to view URL] I need it: - for python 2.7, use any open-source libraries - should run standalone - not as part of a web server. Can be executed simply by "python <script>" - for both Instagram and Twitter (both use OAuth and are very similar) - assume there is no user input, all credentials are hard-coded as global variables Each script should have a function (separate for Instagram and Twitter), which when called with active internet connection, would after some time return a working access_token as specified by documentation of Instagram ([login to view URL]) and Twitter ([login to view URL])