Address matching isn't exactly a new problem. USPS provides an [API](https://developer.usps.com/api/18), and there are several python/ruby/any-other-language libraries/modules that would also just be a call instead of however many dozen lines of custom code you have to test.

Would be very interested in the longevity of this solution. It works today, but will it work in a month/year? A library file on the computer running the rest of the code isn't going to change.