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authorGeorg Brandl <georg@python.org>2007-09-04 07:15:32 (GMT)
committerGeorg Brandl <georg@python.org>2007-09-04 07:15:32 (GMT)
commit6911e3ce3f72af759908b869b73391ea00d328e2 (patch)
tree5d4ff6070cb3f0f46f0a31ee4805b41053a06b48 /Doc/howto/regex.rst
parentc9879246a2dd33a217960496fdf4606cb117c6a6 (diff)
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Convert all print statements in the docs.
Diffstat (limited to 'Doc/howto/regex.rst')
-rw-r--r--Doc/howto/regex.rst56
1 files changed, 28 insertions, 28 deletions
diff --git a/Doc/howto/regex.rst b/Doc/howto/regex.rst
index b200764..1f26687 100644
--- a/Doc/howto/regex.rst
+++ b/Doc/howto/regex.rst
@@ -1,5 +1,5 @@
****************************
- Regular Expression HOWTO
+ Regular Expression HOWTO
****************************
:Author: A.M. Kuchling
@@ -263,7 +263,7 @@ performing string substitutions. ::
>>> import re
>>> p = re.compile('ab*')
- >>> print p
+ >>> p
<re.RegexObject instance at 80b4150>
:func:`re.compile` also accepts an optional *flags* argument, used to enable
@@ -387,7 +387,7 @@ interpreter to print no output. You can explicitly print the result of
:meth:`match` to make this clear. ::
>>> p.match("")
- >>> print p.match("")
+ >>> print(p.match(""))
None
Now, let's try it on a string that it should match, such as ``tempo``. In this
@@ -395,7 +395,7 @@ case, :meth:`match` will return a :class:`MatchObject`, so you should store the
result in a variable for later use. ::
>>> m = p.match('tempo')
- >>> print m
+ >>> m
<_sre.SRE_Match object at 80c4f68>
Now you can query the :class:`MatchObject` for information about the matching
@@ -432,9 +432,9 @@ will always be zero. However, the :meth:`search` method of :class:`RegexObject`
instances scans through the string, so the match may not start at zero in that
case. ::
- >>> print p.match('::: message')
+ >>> print(p.match('::: message'))
None
- >>> m = p.search('::: message') ; print m
+ >>> m = p.search('::: message') ; print(m)
<re.MatchObject instance at 80c9650>
>>> m.group()
'message'
@@ -447,9 +447,9 @@ in a variable, and then check if it was ``None``. This usually looks like::
p = re.compile( ... )
m = p.match( 'string goes here' )
if m:
- print 'Match found: ', m.group()
+ print('Match found: ', m.group())
else:
- print 'No match'
+ print('No match')
Two :class:`RegexObject` methods return all of the matches for a pattern.
:meth:`findall` returns a list of matching strings::
@@ -466,7 +466,7 @@ instances as an iterator. [#]_ ::
>>> iterator
<callable-iterator object at 0x401833ac>
>>> for match in iterator:
- ... print match.span()
+ ... print(match.span())
...
(0, 2)
(22, 24)
@@ -483,7 +483,7 @@ take the same arguments as the corresponding :class:`RegexObject` method, with
the RE string added as the first argument, and still return either ``None`` or a
:class:`MatchObject` instance. ::
- >>> print re.match(r'From\s+', 'Fromage amk')
+ >>> print(re.match(r'From\s+', 'Fromage amk'))
None
>>> re.match(r'From\s+', 'From amk Thu May 14 19:12:10 1998')
<re.MatchObject instance at 80c5978>
@@ -674,9 +674,9 @@ given location, they can obviously be matched an infinite number of times.
For example, if you wish to match the word ``From`` only at the beginning of a
line, the RE to use is ``^From``. ::
- >>> print re.search('^From', 'From Here to Eternity')
+ >>> print(re.search('^From', 'From Here to Eternity'))
<re.MatchObject instance at 80c1520>
- >>> print re.search('^From', 'Reciting From Memory')
+ >>> print(re.search('^From', 'Reciting From Memory'))
None
.. % To match a literal \character{\^}, use \regexp{\e\^} or enclose it
@@ -686,11 +686,11 @@ given location, they can obviously be matched an infinite number of times.
Matches at the end of a line, which is defined as either the end of the string,
or any location followed by a newline character. ::
- >>> print re.search('}$', '{block}')
+ >>> print(re.search('}$', '{block}'))
<re.MatchObject instance at 80adfa8>
- >>> print re.search('}$', '{block} ')
+ >>> print(re.search('}$', '{block} '))
None
- >>> print re.search('}$', '{block}\n')
+ >>> print(re.search('}$', '{block}\n'))
<re.MatchObject instance at 80adfa8>
To match a literal ``'$'``, use ``\$`` or enclose it inside a character class,
@@ -717,11 +717,11 @@ given location, they can obviously be matched an infinite number of times.
match when it's contained inside another word. ::
>>> p = re.compile(r'\bclass\b')
- >>> print p.search('no class at all')
+ >>> print(p.search('no class at all'))
<re.MatchObject instance at 80c8f28>
- >>> print p.search('the declassified algorithm')
+ >>> print(p.search('the declassified algorithm'))
None
- >>> print p.search('one subclass is')
+ >>> print(p.search('one subclass is'))
None
There are two subtleties you should remember when using this special sequence.
@@ -733,9 +733,9 @@ given location, they can obviously be matched an infinite number of times.
in front of the RE string. ::
>>> p = re.compile('\bclass\b')
- >>> print p.search('no class at all')
+ >>> print(p.search('no class at all'))
None
- >>> print p.search('\b' + 'class' + '\b')
+ >>> print(p.search('\b' + 'class' + '\b') )
<re.MatchObject instance at 80c3ee0>
Second, inside a character class, where there's no use for this assertion,
@@ -773,7 +773,7 @@ of a group with a repeating qualifier, such as ``*``, ``+``, ``?``, or
``ab``. ::
>>> p = re.compile('(ab)*')
- >>> print p.match('ababababab').span()
+ >>> print(p.match('ababababab').span())
(0, 10)
Groups indicated with ``'('``, ``')'`` also capture the starting and ending
@@ -1247,17 +1247,17 @@ It's important to keep this distinction in mind. Remember, :func:`match` will
only report a successful match which will start at 0; if the match wouldn't
start at zero, :func:`match` will *not* report it. ::
- >>> print re.match('super', 'superstition').span()
+ >>> print(re.match('super', 'superstition').span())
(0, 5)
- >>> print re.match('super', 'insuperable')
+ >>> print(re.match('super', 'insuperable'))
None
On the other hand, :func:`search` will scan forward through the string,
reporting the first match it finds. ::
- >>> print re.search('super', 'superstition').span()
+ >>> print(re.search('super', 'superstition').span())
(0, 5)
- >>> print re.search('super', 'insuperable').span()
+ >>> print(re.search('super', 'insuperable').span())
(2, 7)
Sometimes you'll be tempted to keep using :func:`re.match`, and just add ``.*``
@@ -1286,9 +1286,9 @@ doesn't work because of the greedy nature of ``.*``. ::
>>> s = '<html><head><title>Title</title>'
>>> len(s)
32
- >>> print re.match('<.*>', s).span()
+ >>> print(re.match('<.*>', s).span())
(0, 32)
- >>> print re.match('<.*>', s).group()
+ >>> print(re.match('<.*>', s).group())
<html><head><title>Title</title>
The RE matches the ``'<'`` in ``<html>``, and the ``.*`` consumes the rest of
@@ -1304,7 +1304,7 @@ example, the ``'>'`` is tried immediately after the first ``'<'`` matches, and
when it fails, the engine advances a character at a time, retrying the ``'>'``
at every step. This produces just the right result::
- >>> print re.match('<.*?>', s).group()
+ >>> print(re.match('<.*?>', s).group())
<html>
(Note that parsing HTML or XML with regular expressions is painful.