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Dictionary that uses regular expressions   Message List  
Reply | Forward Message #106131 of 122067 |
Re: Dictionary that uses regular expressions

"Erik Lechak" <prochak@...> wrote in message
news:1f0bdf30.0308202049.7d251469@....
> Hello all,
>
> I wrote the code below. It is simply a dictionary that uses regular
> expressions to match keys. A quick look at _test() will give you an
> example.
>
> Is there a module that already does this?

Google may prove me wrong, but this looks like a new idea.


> Is there a way and would it
> be better to use list comprehension? (using python 2.3)
>
> Just looking for a better or more pythonic way to do it.

Try inheriting from UserDict.DictMixin instead of dict.

Also, see if there are ways to change the API so that there
is a single return type. That would relieve the user of having
to test every call to see whether it got a collection of answers
or a specific answer. One idea is to have __getitem__ return
an iterator so that it doesn't matter where the number of matches
is zero, one, or many:

for value in rd['put may 7.5']
print value


Raymond Hettinger


--
http://mail.python.org/mailman/listinfo/python-list



Thu Aug 21, 2003 12:05 pm

vze4rx4y@...
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Message #106131 of 122067 |
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Hello all, I wrote the code below. It is simply a dictionary that uses regular expressions to match keys. A quick look at _test() will give you an example. ...
Erik Lechak
prochak@...
Send Email
Aug 21, 2003
4:54 am

"Erik Lechak" <prochak@...> wrote in message news:1f0bdf30.0308202049.7d251469@.... ... Google may prove me wrong, but this looks like...
Raymond Hettinger
vze4rx4y@...
Send Email
Aug 21, 2003
5:14 am

... Some months ago I started rewriting the C regexps module to allow for matching pure-python string types[1]. The python class would just have to define a...
Jack Diederich
jack@...
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Aug 26, 2003
2:45 pm

"Erik Lechak" <prochak@...> wrote in message news:1f0bdf30.0308202049.7d251469@.... ... Not that I know of ... List comp builds a...
Terry Reedy
tjreedy@...
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Aug 21, 2003
5:27 am

I would leave the __getitem__() method alone and just add a filterMatches(self, regexp) returning a ReDict or findMatches(self, regexp) returning a...
Peter Otten
__peter__@...
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Aug 21, 2003
7:49 am

Hey, cool code, I wrote a dictionary-keyed dictionary a while back to get something like the same functionality, basically I wanted an n-dimensional database...
Corey Coughlin
corey.coughlin@...
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Sep 5, 2003
2:21 am
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