[Python-checkins] r73658 - python/branches/py3k/Doc/tutorial/floatingpoint.rst

[raymond.hettinger]

Author: raymond.hettinger
Date: Mon Jun 29 00:30:13 2009
New Revision: 73658

Log:
Small doc fix-ups to floatingpoint.rst.  More are forthcoming.

Modified:
   python/branches/py3k/Doc/tutorial/floatingpoint.rst

Modified: python/branches/py3k/Doc/tutorial/floatingpoint.rst
==============================================================================
--- python/branches/py3k/Doc/tutorial/floatingpoint.rst	(original)
+++ python/branches/py3k/Doc/tutorial/floatingpoint.rst	Mon Jun 29 00:30:13 2009
@@ -82,7 +82,7 @@
 while still preserving the invariant ``eval(repr(x)) == x``.
 
 Historically, the Python prompt and built-in :func:`repr` function would chose
-the one with 17 significant digits, ``0.10000000000000001``, Starting with
+the one with 17 significant digits, ``0.10000000000000001``.   Starting with
 Python 3.1, Python (on most systems) is now able to choose the shortest of
 these and simply display ``0.1``.
 
@@ -123,9 +123,9 @@
 
 Though the numbers cannot be made closer to their intended exact values,
 the :func:`round` function can be useful for post-rounding so that results
-have inexact values that are comparable to one another::
+with inexact values become comparable to one another::
 
-    >>> round(.1 + .1 + .1, 1) == round(.3, 1)
+    >>> round(.1 + .1 + .1, 10) == round(.3, 10)
     True
 
 Binary floating-point arithmetic holds many surprises like this.  The problem
@@ -137,7 +137,7 @@
 wary of floating-point!  The errors in Python float operations are inherited
 from the floating-point hardware, and on most machines are on the order of no
 more than 1 part in 2\*\*53 per operation.  That's more than adequate for most
-tasks, but you do need to keep in mind that it's not decimal arithmetic, and
+tasks, but you do need to keep in mind that it's not decimal arithmetic and
 that every float operation can suffer a new rounding error.
 
 While pathological cases do exist, for most casual use of floating-point
@@ -165,7 +165,7 @@
 
    >>> x = 3.14159
    >>> x.as_integer_ratio()
-   (3537115888337719L, 1125899906842624L)
+   (3537115888337719, 1125899906842624)
 
 Since the ratio is exact, it can be used to losslessly recreate the
 original value::