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bpo-37315: Deprecate accepting floats in math.factorial(). (GH-14147)

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Serhiy Storchaka 2019-06-17 16:57:27 +03:00 • committed by GitHub
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5 changed files with 28 additions and 7 deletions
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Doc/library/math.rst
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@ -71,6 +71,9 @@ Number-theoretic and representation functions
Return *x* factorial as an integer. Raises :exc:`ValueError` if *x* is not integral or
is negative.
.. deprecated:: 3.9
Accepting floats with integral values (like ``5.0``) is deprecated.
.. function:: floor(x)

5
Doc/whatsnew/3.9.rst
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@ -109,6 +109,11 @@ Build and C API Changes
Deprecated
==========
* Currently :func:`math.factorial` accepts :class:`float` instances with
non-negative integer values (like ``5.0``). It raises a :exc:`ValueError`
for non-integral and negative floats. It is deprecated now. In future
Python versions it will raise a :exc:`TypeError` for all floats.
(Contributed by Serhiy Storchaka in :issue:`37315`.)
Removed