[Python-checkins] r59505 - python/trunk/Doc/library/collections.rst

[raymond.hettinger]

Author: raymond.hettinger
Date: Fri Dec 14 22:51:50 2007
New Revision: 59505

Modified:
   python/trunk/Doc/library/collections.rst
Log:
Add usage note

Modified: python/trunk/Doc/library/collections.rst
==============================================================================
--- python/trunk/Doc/library/collections.rst	(original)
+++ python/trunk/Doc/library/collections.rst	Fri Dec 14 22:51:50 2007
@@ -488,6 +488,14 @@
       >>> Pixel(11, 22, 128, 255, 0)
       Pixel(x=11, y=22, red=128, green=255, blue=0)'
 
+To retrieve a field whose name is stored in a string, use the :func:`getattr`
+function:
+
+::
+
+    >>> getattr(p, 'x')
+    11
+
 Since a named tuple is a regular Python class, it is easy to add or change
 functionality.  For example, the display format can be changed by overriding
 the :meth:`__repr__` method:
@@ -496,8 +504,8 @@
 
     >>> Point = namedtuple('Point', 'x y')
     >>> Point.__repr__ = lambda self: 'Point(%.3f, %.3f)' % self
-    >>> Point(x=10, y=20)
-    Point(10.000, 20.000)
+    >>> Point(x=11, y=22)
+    Point(11.000, 22.000)
 
 Default values can be implemented by starting with a prototype instance
 and customizing it with :meth:`_replace`: