[Python-Dev] PyObject_RichCompareBool identity shortcut

[Nick Coghlan]

On Thu, Apr 28, 2011 at 1:43 AM, Alexander Belopolsky
<alexander.belopolsky at gmail.com> wrote:
> High performance applications that rely on non-reflexivity will still
> have an option of using ctypes.c_float type or NumPy.

However, that's exactly the reason I don't see any reason to reverse
course on having float() and Decimal() follow IEEE754 semantics,
regardless of how irritating we may find those semantics to be.

Since we allow types to customise __eq__ and __ne__ with non-standard
behaviour, if we want to permit *any* type to have a non-reflexive
notion of equality, then we need to write our container types to
enforce reflexivity when appropriate. Many of the builtin types
already do this, by virtue of it being built in to RichCompareBool.
It's now a matter of documenting that properly and updating the
non-conformant types accordingly.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia