Hi! How can I vote for this app in the rank?

I was watching the #89 pull request, maybe if you add a validation before the loop asking for all the variables equal to zero , you could avoid the entire loop (if 0 is the default value of all the field will be usefull).

I dont know python language, and I supous that the cast and try is enough, but is possible to use Sql injection in this kind of forms?

Best regards!