issubclass() not as documented

[Skaperen]

Given that the function returns True in some cases, it should be obvious that it would return False in others (and really if a function is called "is something", you'd expect it to return a Boolean. Throwing an exception in the false case seems like bad design to me, as it's confusing for the caller.

it may seem obvious but lots of other things are documented complete enough that you don't need to depend on your imagination. besides this documentation does say what it does in other cases.