I'm trying to use auto-doc tool to generate API doc for Tastypie REST API. I tried Tastytool, but it seems not showing the API's result parameters but the model's columns. Then I tried Sphinx seems more promising since Tastypie supports Sphinx, but I can't find an example to show where & how to put comment for the API inside the code, and generate them into the document. 
Anyone can share some info or example about correctly write comment and generate Sphinx doc for Tastypie based API? thanks.
Perhaps I'm completely missing the point of your question but if you are just trying to build the docs that come with the source distribution there is a Makefile in the docs directory that performs the necessary actions.  You are required to specify a target output type such as html, json, latex, etc. I keep a local copy of the docs for django, tastypie, and slumber as I use all three in conjunction with each other and I use the option make html frequently.
If I am mistaken about what you are trying to accomplish perhaps we can come to some clarification.
Tastypie documentation generation