Behaviour of comparison between int and tuple

Question

For some reason

999 < (0, 6, 7, 8)

Evaluates to True

In fact, all tuples appear to be greater than all ints.

According to the docs ,

Instances of tuple or list can be compared only within each of their types.

Is there documentation for this behaviour? Is there some implicit casting happening?

Answer 1

According to the documentation you linked, when it discusses comparing tuples to other types:

ordering comparison across these types gives an arbitrary order.

So, it sounds like this behavior is undefined in Python 2 (correct me if I'm wrong). Doing this same comparison in Python 3 gives the following error:

Traceback (most recent call last):
  File "main.py", line 1, in <module>
    print(999 < (0, 6, 7, 8))
TypeError: '<' not supported between instances of 'int' and 'tuple'