Actually, I think exceptions are the clearest way to represent errors of any kind (reconcilable or not). > A null value, a plain "error" object, or an error ar

Actually, I think exceptions are the clearest way to represent errors of any kind (reconcilable or not). > A null value, a plain "error" object, or an error argument In my mind, this just adds a lot more mental overhead while also being less informative than a simple exception. Plus you have to keep track of which method your current library has chosen to represent errors. Note I am biased from using Python for a long time.