Mystiletto, when I got my python Chloe Silverado, the SA told me not to do anything special at all to it. If I was planning to take it out in the rain (which she recommended against) to spray it with something for that purpose. I have worn it in the rain with no protectant (though not a heavy rain) and it's fine. Given that the piece you bought will be in your purse, I think it should be pretty safe. You might want to put it in a zip compartment if possible to minimize wear of the scales, if they're large and might be prone to damage.
When I bought my python BV wallet, they didn't say anything about using a conditioner or other protectant.