The infamous python comma

gistfile1.txt

so a C programmer sees:
      a, b=b, a
and thinks:
      (a), (b=b), (a)
and wonders WTF?

but python thinks:
      (a,b) = (b,a)
and swaps a and b with no more effort and no intermediate...

WHY? Because in Python, COMMA is NOT AN OPERATOR
   comma is just a seperator and has no magic.
   specifically it seperates things into tuples...
   
ALSO! it should be written a,b = b,a but python doesn't
see the whitespace either...

a,b,c,d = d,c,b,a works too, very cool!