detect prompt change for interactive python

[gamename]

Hi,

My normal prompt is "> ".  When I start python interactively with
"python -i", the prompt is now set to ">>> ".

Everything works fine except when I try to recall the previous
commands with "comint-previous-input".  The previous command is
restored to a position just after the first ">" sign.

Here are some examples.

bash prompt:
> oldCmdRecalled

python interactive:
>oldCmdRecalled>>

behavior I want:
>>> oldCmdRecalled

How do I dynamically set the buffer to accept ">>>" as a prompt and
restore commands in the correct spot?

THanks
-T