I am using the Python facebook-sdk client library. I currently have a short-lived access token obtained from https://developers.facebook.com/tools/accesstoken/ that I copy the c
According to their subsection on extending short lived client tokens, you'll need to take in your short lived client token and, having filled in the relevant app data, send a GET request from your server to the following endpoint:
GET /oauth/access_token?
grant_type=fb_exchange_token&
client_id={app-id}&
client_secret={app-secret}&
fb_exchange_token={short-lived-token}
The response will contain your long-lived access token which can then be passed back to the client or used on your server. If you don't currently have a module for performing HTTP operations, I highly recommend Requests.