classify abs() argument type (GH-8103)

3ae2e33a · Windson yang · Raymond Hettinger · e55ca3fd · 3ae2e33a
Commit 3ae2e33a authored Jul 06, 2018 by Windson yang Committed by Raymond Hettinger Jul 05, 2018
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Doc/library/functions.rst Doc/library/functions.rst +2 -1

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--- 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)