Ok I am programing a way to interface with Grooveshark (<http://grooveshark.com>). Right now I have a class Grooveshark and several methods, one gets a session with the server, another gets a token that is based on the session and another is used to construct api calls to the server (and other methods use that). Right now I use it like so.... Note uses twisted and t.i.defer in twisted

```
g = Grooveshark()
d = g.get_session()
d.addCallback(lambda x: g.get_token())
## and then something like.... ##
g.search("Song")

```

I find this unpythonic and ugly sense even after initializing the class you have to call two methods first or else the other methods won't work. To solve this I am trying to get it so that the method that creates api calls takes care of the session and token. Currently those two methods (the session and token methods) set class variables and don't return anything (well None). So my question is, is there a common design used when interfacing with sites that require tokens and sessions? Also the token and session are retrieved from a server so I can't have them run in the **init** method (as it would either block or may not be done before a api call is made)