Re: [Python-Dev] Experiment: Adding re to string objects.
MRAB wrote:
Sean Reifschneider wrote:
I'm mailing this to python-dev because I'd like feedback on the idea of
adding an re attribute to strings. I'm not sure if it's a good
idea or
not yet, but I figure it's worth discussion. The module mentioned here
includes a class called restr() which allows you to play with s.re.
As some of you may recall, I'm not particularly fond of the recipe:
m = re.match(r'whatever(.*)', s)
if m:
m.group(1)
The other morning I came up on the idea of adding an re to strings, so
you could do things like:
if s.re.match(r'whatever(.*)'):
print s.re.group(1)
or:
if (date.re.match(r'(?Pyear\d\d\d\d)-(?Pmonth\d\d)' or
date.re.match(r'(?Pmonth\d\d)-(?Pyear\d\d\d\d)'):
print date.re.groupdict('year')
[snip]
Why not drop the .re part? You would, however, then need a new name
for the re split, eg re_split.
Or you could make the string the pattern, eg r'whatever(.*)'.match(s).
+1 for re support built-in to strings.
Michael Foord
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[Python-Dev] Experiment: Adding re to string objects.
I'm mailing this to python-dev because I'd like feedback on the idea of
adding an re attribute to strings. I'm not sure if it's a good idea or
not yet, but I figure it's worth discussion. The module mentioned here
includes a class called restr() which allows you to play with s.re.
As some of you may recall, I'm not particularly fond of the recipe:
m = re.match(r'whatever(.*)', s)
if m:
m.group(1)
The other morning I came up on the idea of adding an re to strings, so
you could do things like:
if s.re.match(r'whatever(.*)'):
print s.re.group(1)
or:
if (date.re.match(r'(?Pyear\d\d\d\d)-(?Pmonth\d\d)' or
date.re.match(r'(?Pmonth\d\d)-(?Pyear\d\d\d\d)'):
print date.re.groupdict('year')
So I decided to try experimenting with it and see how I like it. I've also
thrown a bunch of other stuff into it and made a module called
filtertools:
http://pypi.python.org/pypi/filtertools/0.01
ftp://ftp.tummy.com/pub/tummy/Python/python-filtertools/
As the version number is meant to indicate, this is something that I'm
still exploring whether it is the right thing done in the right way.
Though at the moment the only thing I plan to change is that some of the
iterators (having nothing to do with adding re to string objects)
probably shouldn't consume the barrier such as the dropwhile() and
takewhile(). You might want to do something like:
fp = filtertools.reopen('mailbox')
for header in filtertools.takewhile([ r'^\S' ], fp.readlines()) :
print 'HEADER:', header.rstrip()
for continued in filtertools.takewhile([ r'^\s+\S' ], fp.readlines()) :
print 'CONTINUED:', continued.rstrip()
But, the takewhile() I will consume the first non-matching line.
Anyway, I appreciate any feedback folks have.
Thanks,
Sean
--
What we see depends on mainly what we look for.
-- John Lubbock
Sean Reifschneider, Member of Technical Staff j...@tummy.com
tummy.com, ltd. - Linux Consulting since 1995: Ask me about High Availability
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Re: [Python-Dev] Experiment: Adding re to string objects.
On Fri, Jul 17, 2009, Sean Reifschneider wrote: I'm mailing this to python-dev because I'd like feedback on the idea of adding an re attribute to strings. I'm not sure if it's a good idea or not yet, but I figure it's worth discussion. The module mentioned here includes a class called restr() which allows you to play with s.re. Ideas should go to python-ideas, please. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ If you think it's expensive to hire a professional to do the job, wait until you hire an amateur. --Red Adair ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Experiment: Adding re to string objects.
Sean Reifschneider wrote:
I'm mailing this to python-dev because I'd like feedback on the idea of
adding an re attribute to strings. I'm not sure if it's a good idea or
not yet, but I figure it's worth discussion. The module mentioned here
includes a class called restr() which allows you to play with s.re.
As some of you may recall, I'm not particularly fond of the recipe:
m = re.match(r'whatever(.*)', s)
if m:
m.group(1)
The other morning I came up on the idea of adding an re to strings, so
you could do things like:
if s.re.match(r'whatever(.*)'):
print s.re.group(1)
or:
if (date.re.match(r'(?Pyear\d\d\d\d)-(?Pmonth\d\d)' or
date.re.match(r'(?Pmonth\d\d)-(?Pyear\d\d\d\d)'):
print date.re.groupdict('year')
[snip]
Why not drop the .re part? You would, however, then need a new name
for the re split, eg re_split.
Or you could make the string the pattern, eg r'whatever(.*)'.match(s).
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