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authorEzio Melotti <ezio.melotti@gmail.com>2011-03-13 02:27:26 +0200
committerEzio Melotti <ezio.melotti@gmail.com>2011-03-13 02:27:26 +0200
commit0def5c69070c80093af1e05266c61d053aaba3e1 (patch)
treedb87378f88892d89d3491bbb11ba3a617e6ca0a0 /Doc/tutorial/inputoutput.rst
parent546398d02c3d909dca5d760c87b5f2f40948b65a (diff)
parent2b73660135794cdcd37966ef82b2c9eddc54911c (diff)
downloadcpython-git-0def5c69070c80093af1e05266c61d053aaba3e1.tar.gz
Merge with 3.1.
Diffstat (limited to 'Doc/tutorial/inputoutput.rst')
-rw-r--r--Doc/tutorial/inputoutput.rst39
1 files changed, 19 insertions, 20 deletions
diff --git a/Doc/tutorial/inputoutput.rst b/Doc/tutorial/inputoutput.rst
index b35cc8051a..00f5aea609 100644
--- a/Doc/tutorial/inputoutput.rst
+++ b/Doc/tutorial/inputoutput.rst
@@ -40,8 +40,8 @@ which can be read by the interpreter (or will force a :exc:`SyntaxError` if
there is not equivalent syntax). For objects which don't have a particular
representation for human consumption, :func:`str` will return the same value as
:func:`repr`. Many values, such as numbers or structures like lists and
-dictionaries, have the same representation using either function. Strings and
-floating point numbers, in particular, have two distinct representations.
+dictionaries, have the same representation using either function. Strings, in
+particular, have two distinct representations.
Some examples::
@@ -50,9 +50,7 @@ Some examples::
'Hello, world.'
>>> repr(s)
"'Hello, world.'"
- >>> str(1.0/7.0)
- '0.142857142857'
- >>> repr(1.0/7.0)
+ >>> str(1/7)
'0.14285714285714285'
>>> x = 10 * 3.25
>>> y = 200 * 200
@@ -103,17 +101,18 @@ Here are two ways to write a table of squares and cubes::
(Note that in the first example, one space between each column was added by the
way :func:`print` works: it always adds spaces between its arguments.)
-This example demonstrates the :meth:`rjust` method of string objects, which
-right-justifies a string in a field of a given width by padding it with spaces
-on the left. There are similar methods :meth:`ljust` and :meth:`center`. These
-methods do not write anything, they just return a new string. If the input
-string is too long, they don't truncate it, but return it unchanged; this will
-mess up your column lay-out but that's usually better than the alternative,
-which would be lying about a value. (If you really want truncation you can
-always add a slice operation, as in ``x.ljust(n)[:n]``.)
+This example demonstrates the :meth:`str.rjust` method of string
+objects, which right-justifies a string in a field of a given width by padding
+it with spaces on the left. There are similar methods :meth:`str.ljust` and
+:meth:`str.center`. These methods do not write anything, they just return a
+new string. If the input string is too long, they don't truncate it, but
+return it unchanged; this will mess up your column lay-out but that's usually
+better than the alternative, which would be lying about a value. (If you
+really want truncation you can always add a slice operation, as in
+``x.ljust(n)[:n]``.)
-There is another method, :meth:`zfill`, which pads a numeric string on the left
-with zeros. It understands about plus and minus signs::
+There is another method, :meth:`str.zfill`, which pads a numeric string on the
+left with zeros. It understands about plus and minus signs::
>>> '12'.zfill(5)
'00012'
@@ -128,16 +127,16 @@ Basic usage of the :meth:`str.format` method looks like this::
We are the knights who say "Ni!"
The brackets and characters within them (called format fields) are replaced with
-the objects passed into the :meth:`~str.format` method. A number in the
+the objects passed into the :meth:`str.format` method. A number in the
brackets can be used to refer to the position of the object passed into the
-:meth:`~str.format` method. ::
+:meth:`str.format` method. ::
>>> print('{0} and {1}'.format('spam', 'eggs'))
spam and eggs
>>> print('{1} and {0}'.format('spam', 'eggs'))
eggs and spam
-If keyword arguments are used in the :meth:`~str.format` method, their values
+If keyword arguments are used in the :meth:`str.format` method, their values
are referred to by using the name of the argument. ::
>>> print('This {food} is {adjective}.'.format(
@@ -195,8 +194,8 @@ notation. ::
>>> print('Jack: {Jack:d}; Sjoerd: {Sjoerd:d}; Dcab: {Dcab:d}'.format(**table))
Jack: 4098; Sjoerd: 4127; Dcab: 8637678
-This is particularly useful in combination with the new built-in :func:`vars`
-function, which returns a dictionary containing all local variables.
+This is particularly useful in combination with the built-in function
+:func:`vars`, which returns a dictionary containing all local variables.
For a complete overview of string formatting with :meth:`str.format`, see
:ref:`formatstrings`.