➜
This issue tracker has been migrated to GitHub,
and is currently read-only.
For more information,
see the GitHub FAQs in the Python's Developer Guide.
Created on 2020-06-20 09:20 by tamuhey, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 20999 | closed | rhettinger, 2020-06-20 09:59 | |
| Messages (4) | |||
|---|---|---|---|
| msg371927 - (view) | Author: tamuhey (tamuhey) | Date: 2020-06-20 09:20 | |
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.
|
|||
| msg371928 - (view) | Author: Raymond Hettinger (rhettinger) *  |
Date: 2020-06-20 09:40 | |
Thanks for the report. I'll add a note to the C API docs. |
|||
| msg371930 - (view) | Author: Raymond Hettinger (rhettinger) * |
Date: 2020-06-20 10:13 | |
Hmm, I missed it. There is already a note in the link you provided" """Note If o1 and o2 are the same object, PyObject_RichCompareBool() will always return 1 for Py_EQ and 0 for Py_NE.""" |
|||
| msg371931 - (view) | Author: tamuhey (tamuhey) | Date: 2020-06-20 10:28 | |
> Hmm, I missed it. There is already a note in the link you provided
I've read the comment before posting this issue.
But I think there should be the following info:
1. example (float("nan"))
2. the result is inconsistent with PyObject_RichCompare
|
|||
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:32 | admin | set | github: 85221 |
| 2020-06-20 10:28:45 | tamuhey | set | messages: + msg371931 |
| 2020-06-20 10:13:40 | rhettinger | set | status: open -> closed resolution: out of date messages: + msg371930 stage: patch review -> resolved |
| 2020-06-20 09:59:26 | rhettinger | set | keywords:
+ patch stage: patch review pull_requests: + pull_request20174 |
| 2020-06-20 09:54:05 | rhettinger | set | title: PyObject_RichCompareBool(nan, nan, eq) can be True -> Document pointer comparison in PyObject_RichCompareBool() |
| 2020-06-20 09:40:48 | rhettinger | set | versions:
- Python 3.5, Python 3.6, Python 3.7 nosy: + rhettinger messages: + msg371928 assignee: rhettinger components: + Documentation, - C API |
| 2020-06-20 09:20:57 | tamuhey | create | |