New submission from tamuhey <tamu...@gmail.com>:
Applying PyObject_RichCompareBool to two `nan`s can be true if the two nans are
same object, i.e.
```
a = float("nan")
PyObject_RichCompareBool(a, a, Py_EQ) // True
```
I read the document
(https://docs.python.org/3/c-api/object.html?highlight=pyobject_richcomparebool#c.PyObject_RichCompareBool)
and understood it is intended, but there should be gentle comment to tell
users this behaviour.
----------
components: C API
messages: 371927
nosy: tamuhey
priority: normal
severity: normal
status: open
title: PyObject_RichCompareBool(nan, nan, eq) can be True
type: enhancement
versions: Python 3.10, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python
3.9
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41049>
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