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Lambda question

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I was surfing around looking for a way to split a list into equal sections.  I 
came upon this algorithm: 
 
>>> f = lambda x, n, acc=[]: f(x[n:], n, acc+[(x[:n])]) if x else acc 
>>> f("Hallo Welt", 3) 
['Hal', 'lo ', 'Wel', 't'] 
 
http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-s
ized-chunks-in-python/312644
 
It doesn't work with a huge list, but looks like it could be handy in certain 
circumstances.  I'm trying to understand this code, but am totally lost.  I 
know a little bit about lambda, as well as the ternary operator, but how 
does this part work: 
 
>>> f('dude'[3:], 3, []+[('dude'[:3])]) 
['dud', 'e'] 
 
Is that some sort of function call, or something else?  I'm guessing it works 
recursively? 
 
Just curious if anyone could explain how this works or maybe share a link 
to a website that might explain this? 
 
Thanks. 
 
Jay 

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Lambda question <jyoung79@kc.rr.com> - 2011-06-04 17:46 +0000
  Re: Lambda question Mel <mwilson@the-wire.com> - 2011-06-04 14:21 -0400
  Re: Lambda question Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2011-06-05 11:31 +0200
    Re: Lambda question Terry Reedy <tjreedy@udel.edu> - 2011-06-05 14:33 -0400
      Re: Lambda question rusi <rustompmody@gmail.com> - 2011-06-06 10:29 -0700
        Re: Lambda question Terry Reedy <tjreedy@udel.edu> - 2011-06-06 21:56 -0400

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