[Python-checkins] r60039 - peps/trunk/pep-0754.txt

[christian.heimes]

Author: christian.heimes
Date: Fri Jan 18 09:36:51 2008
New Revision: 60039

Modified:
   peps/trunk/pep-0754.txt
Log:
Updated PEP 754 to mention the new Python 2.6 features.

Modified: peps/trunk/pep-0754.txt
==============================================================================
--- peps/trunk/pep-0754.txt	(original)
+++ peps/trunk/pep-0754.txt	Fri Jan 18 09:36:51 2008
@@ -17,6 +17,24 @@
 This PEP has been rejected. After sitting open for four years, it has
 failed to generate sufficient community interest.
 
+Several ideas of this PEP were implemented for Python 2.6. ``float('inf')``
+and ``repr(float('inf'))`` are now guaranteed to work on every supported
+platform with IEEE 754 semantics. However the ``eval(repr(float('inf')))``
+roundtrip is still not supported unless you define inf and nan yourself::
+
+    >>> inf = float('inf')
+    >>> inf, 1E400
+    (inf, inf)
+    >>> neginf = float('-inf')
+    >>> neginf, -1E400
+    (-inf, -inf)
+    >>> nan = float('nan')
+    >>> nan, inf * 0.
+    (nan, nan)
+
+The math and the sys module also have gained additional features,
+``sys.float_info``, ``math.isinf``, ``math.isnan``, ``math.copysign``.
+
 
 Abstract
 ========