Right now OPT displays one state at a time. For simple algorithms, students often find it helpful

to have the entire state displayed in a table, and will manually insert in `print` statements like so:

<pre>

i = 0

numbers = []

while i < 6:

print 'At the top i is %d' % i

numbers.append(i)

i = i + 1

print 'Numbers now: ', numbers

print 'At the bottom i is %d' % i

print 'The numbers: '

for num in numbers:

print num

</pre>

Question: Can we augment OPT to provide this sort of "cumulative tabular view"?

All of the data is right there in the trace; it's just a matter of visualizing it properly.

For instance (this output is faked, so it's not accurate):

i numbers code executed

-------------------------------------------

0 [0] while i < 6:

1 [0, 1] i = i + 1

2 [0, 1, 2] while i < 6:

3 [0, 1, 2, 3] i = i + 1

4 [0, 1, 2, 3, 4]

The obvious challenge here is scalabiilty, and what happens when there are multiple frames.

Some ideas include:

- having the user manually document (in, say, a docstring) which variables to print to the table

- only printing the table for one frame at a time

- or maybe nesting frames