On 5/18/2011 2:51 PM, Ethan Furman wrote:
In Python 3 inequality comparisons became forbidden.
--> 123 < [1, 2, 3]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unorderable types: int() < list()
However, equality comparisons are still allowed
--> 123 == [1, 2, 3]
False
But you can't mix them (inequality wins)
--> 123 <= [1, 2, 3]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unorderable types: int() <= list()
I realize this is probably a Py4000 change if it happens at all, but
does this make sense? Shouldn't an attempt to compare to unlike objects
be a TypeError, just like trying to order them is?
It bit me when I tried to compare a byte string element with a single
character byte string (of course they should have matched, but since the
element was an int, the match was not longer True).
Questions/comments like this that are not about developing the next
versions of Python, as you acknowledge above, really belong elsewhere,
like on the ideas list.
--
Terry Jan Reedy
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