One could argue that the same holds for the second example. Sure, the parameter is called `numbers` but who knows what it will contain at runtime. It could be f

One could argue that the same holds for the second example. Sure, the parameter is called `numbers` but who knows what it will contain at runtime. It could be full of vectors, matrices or sheep. _Some_ of the objects could have a custom definitions for __lt__ and __mod__ (custom overloads for the < and % operators in Python). In that sense, if we accept that `<` and `%` have sensible definitions in the second example, it would only be fair to assume the same for the helper functions first example.