Re: [Pyparsing] Supporting Spelling Variations

[Paul M. <pa...@al...>]

Tim -

Avoid Or in favor of MatchFirst when you have unambiguous alternatives like
this.  And if you have a priori knowledge of which variation will be more
common, put it first in the list.

Here are a couple of options:
- Suppress( oneOf("specialize specialise") )
- MatchFirst( map(Suppress,["specialize","specialise"]) )
- Regex("speciali[sz]e").suppress()

I've not had a chance to test any of these for performance, but they should
be equivalent functionally.

-- Paul



-----Original Message-----
From: pyp...@li...
[mailto:pyp...@li...] On Behalf Of Tim Cook
Sent: Monday, September 10, 2007 3:29 AM
To: PyParsing List
Subject: [Pyparsing] Supporting Spelling Variations

Hi All,

I need to support both 'specialise' and 'specialize'  (actually there are
many British/Australian/US spelling variations like this) 

My first attempts were to use either an Or list or a MatchFirst list.

i.e. Suppress("specialise" Or "specialize")

Each of those raised: TypeError: unsupported operand type(s) for ^:
'str' and 'str'

My solution (so far) is:
specialise = Suppress("specialise")
specialize = Suppress("specialize")
specialiseSection = (specialise | specialize + ...

Is there a better/more efficient approach?

Cheers,
Tim



--
Timothy Cook, MSc
Health Informatics Research & Development Services
http://timothywayne.cook.googlepages.com/home
01-904-322-8582


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