parsing combination strings

[PKKR]

I need a fast and efficient way to parse a combination string(digits +
chars)

ex: s = "12ABA" or "1ACD" or "123CSD" etc

I want to parse the the above string such that i can grab only the
first digits and ignore the rest of the chacters,

so if i have s = "12ABA" , parser(s) should give me "12" or "1" or
"123".

I can think of a quick dirty way by checking each element in the
string and do a 'str.isdigit()' and stop once its not a digit, but
appreciate any eligent way.

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Re: parsing combination strings

[PKKR]

ah ok, i guess something like this should do it for me then?

re.split('[^0-9]', str)[0]


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Re: parsing combination strings

[PKKR]

On Mar 21, 2:51 pm, "Steven D. Arnold" <[EMAIL PROTECTED]> wrote:
> On Mar 21, 2007, at 2:42 PM, PKKR wrote:
>
> > I need a fast and efficient way to parse a combination string(digits +
> > chars)
>
> > ex: s = "12ABA" or "1ACD" or "123CSD" etc
>
> > I want to parse the the above string such that i can grab only the
> > first digits and ignore the rest of the chacters,
>
> A regex leaps to mind.have you investigated the "re" module?
>
>  >>> import re
>  >>> re.match(r'(\d+)', '123abc').group(1)
> '123'
>
> steven


yep thats what i tried as per tommy's advice and came up with:

re.split('[^0-9]', str)[0]

or is there a better way?

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