It doesn't have to even be "underhanded". Libraries like SQLAlchemy overload `==` to return a piece of a query predicate (e.g., `foo == 0` => `WHERE foo = 0`), similarly, if I recall correctly, there's an overloaded `and` operator, which performs a similar function. Because Python is truthy and these operators return objects, I think this may evaluate to `True` without being deliberately underhanded. Granted, building a query predicate `WHERE a = 1 AND a = 2 AND a = 3` isn't a useful thing to do in the first place, but still not underhanded.