these are simply multi-line strings, that can also be used as comments.

Forgot to_f convertion

So you can create a list of comments?

What is being repeated that shouldn't be in this solution?

+1 to the pool of "Please implement solution downvotes" suggestions. So tired of seeing terrible solutions snowball to accumulate insane number of "best practice" votes simply because they are cryptically short.

Swallowing any helpful error messages simply to return string "Error" does not seem like best practices to me.

All-around bad Python translation -- super lazy

For anyone seeing this years later in a similar boat as CodingRookie, res is likely (but not necessarily) short for result.

res could have been any word at all, but the author of the kata decided on res.