Enabling Comments on Blog in this Site

I am working on getting some way to enable readers to comment on the blogs of this site. I am finding it a bit difficult because the codes I want to emulate have different references and nomenclature. The code on which this site is built , is robust and time tested and secure with functionality of forgot password recovery. So the coding for extended functionality should also have to be compliant to the standard. At present I am taking up django for every body course from coursera to get it working. How ever if any one has a solution plaese share it so that the function can be added to this site.