[Python-checkins] classify abs() argument type (GH-8103)

[Raymond Hettinger]

https://github.com/python/cpython/commit/3ae2e33a61f8aebbe6ce16f1030687a6e66dbb72
commit: 3ae2e33a61f8aebbe6ce16f1030687a6e66dbb72
branch: master
author: Windson yang <wiwindson at outlook.com>
committer: Raymond Hettinger <rhettinger at users.noreply.github.com>
date: 2018-07-05T16:09:53-07:00
summary:

classify abs() argument type (GH-8103)

files:
M Doc/library/functions.rst

diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index f5427a4072a8..6476cbd65e01 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -44,7 +44,8 @@ are always available.  They are listed here in alphabetical order.
 
    Return the absolute value of a number.  The argument may be an
    integer or a floating point number.  If the argument is a complex number, its
-   magnitude is returned.
+   magnitude is returned. If *x* defines :meth:`__abs__`,
+   ``abs(x)`` returns ``x.__abs__()``.
 
 
 .. function:: all(iterable)