Adding session02 homework

Pull request is from master because I tried out the merge function, then kept doing session02 homework in the newly merged master.  I'll keep the next HW on a session03 branch.  Can't keep this stuff straight.  :-)

Thanks!
Robert
I thought the HW instructions said to go up to m=4, n=4 on the table in the
Wikipedia article, so I started out with an assert statement for each cell
in the table (the table gave the higher order answers as powers of two).
The max recursion depth error message was thrown by the interpreter on the
first run, so I just commented them out one by one till it stopped
complaining.

On Sun, Oct 12, 2014 at 9:27 PM, Christopher H.Barker, PhD <
notifications@github.com> wrote:

> In Students/RPerkins/session02/ack.py:
>
> > +    assert ack(1, 1) == 3
> > +    assert ack(1, 2) == 4
> > +    assert ack(1, 3) == 5
> > +    assert ack(1, 4) == 6
> > +    assert ack(2, 0) == 3
> > +    assert ack(2, 1) == 5
> > +    assert ack(2, 2) == 7
> > +    assert ack(2, 3) == 9
> > +    assert ack(2, 4) == 11
> > +    assert ack(3, 0) == 5
> > +    assert ack(3, 1) == 13
> > +    assert ack(3, 2) == 29
> > +    assert ack(3, 3) == 61
> > +    assert ack(3, 4) == 125
> > +    #  max recursion depth exceeded after this point
> > +    #assert ack(4, 0) == 2**2**2-3
>
> nice! where did you find that?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/UWPCE-PythonCert/IntroToPython/pull/12/files#r18753604>
> .
>



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