Cannot understand the detailedly the following code

[Gabriel Genellina]

En Thu, 10 Apr 2008 23:57:29 -0300, <reachmsn at hotmail.com> escribió:

> i.e. you give, the graph, the start and end vertices as inputs and you
> get the output as a listing of all the paths. This is where I got to.
> It would be very nice if you could kindly hint on how to proceed
> further. Thank you so much for your time!

If you want to understand how recursion works, or how you can actually  
construct a recursive function step by step, see this excellent post by  
Neil Cerutti:

http://groups.google.com/group/comp.lang.python/msg/9f0b10631fd47886

-- 
Gabriel Genellina