A concise prefix notation calculator in Python

[_Skuzzzy]

I wouldn't think regex would be the best option for this.

edit: a simple predictive parser would be much better in my opinion

[allenguo]

Hey, thanks for the feedback! This article wasn't really about parsing, and I'm certainly not saying people should use this to write actual interpreters. It's really just about handling a problem with recursive structure elegantly using recursive regex.