Skip to content

gh-137871: Clarify cmath.nan documentation by linking to math module #137876

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 4 commits into
base: main
Choose a base branch
from
Open

gh-137871: Clarify cmath.nan documentation by linking to math module #137876

Changes from 3 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
16dc6e2
Docs: Clarify cmath.nan/inf by linking to math module
AzizCode92 Aug 17, 2025
f2cada9
Update Doc/library/cmath.rst
AzizCode92 Aug 17, 2025
5452a2e
Update Doc/library/cmath.rst
AzizCode92 Aug 17, 2025
d0b956e
[Doc]: Make `nan` description more compact.
AzizCode92 Aug 23, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions Doc/library/cmath.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -340,6 +340,8 @@ Constants
A floating-point "not a number" (NaN) value. Equivalent to
``float('nan')``.

See also :data:`math.nan`.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

cmath.nan is more equivalent to math.nan than float('nan') in being a fixed data object, with a fixed id, rather than a function which can return different objects with different ids when called multiple times.

Suggested change
``float('nan')``.
See also :data:`math.nan`.
:data:`math.nan`.

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I don't think it's better. Link just show you same statement of "equivalency". Better just inline it here. In all respect it's "an equivalency", i.e. all nan's in Python are same in sense that we don't have separated signaling/quiet nans and they don't have payload. (Or, in some sense, we don't have simple user interface to this stuff.)

(BTW, I think you suggestion is off by one whitespace.)

.. versionadded:: 3.6


Expand Down
Loading