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[3.10] gh-85417: Clarify behaviour on branch cuts in cmath module (GH-102046) #102275

Merged
merged 1 commit into from
Feb 26, 2023
Merged

[3.10] gh-85417: Clarify behaviour on branch cuts in cmath module (GH-102046) #102275

merged 1 commit into from
Feb 26, 2023

Commits on Feb 26, 2023

  1. pythongh-85417: Clarify behaviour on branch cuts in cmath module (pyt… 

    …honGH-102046)

This PR updates the cmath module documentation to reflect the reality that Python is almost always (and as far as I can tell, that "almost" can be omitted) running on a machine whose C double supports signed zeros.

* Removes misleading references to functions being continuous from above / below / the left / the right at branch cuts
* Expands the note on branch cuts at the top of the module documentation to explain the double-sided sign-of-zero-based behaviour
(cherry picked from commit b513c46)

Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
    @mdickinson @miss-islington
    mdickinson authored and miss-islington committed Feb 26, 2023
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