string splitting

[rdharles@gmail.com]

Hello,
I have thousands of files that look something like this:

wisconsin_state .txt
french_guiana_d istrict.txt
central_african _republic_provi nce.txt

I need to extract the string between the *last* underscore and the
extention.
So based on the files above, I want returned:
state
district
province

My plan was to use .split or .find but I can't figure out how locate
only the last underscore in the filename.

Anyone have any ideas?

Thanks.
R.D.

[hiaips]

Re: string splitting


rdhar...@gmail. com wrote:

Hello,
I have thousands of files that look something like this:
>
wisconsin_state .txt
french_guiana_d istrict.txt
central_african _republic_provi nce.txt
>
I need to extract the string between the *last* underscore and the
extention.
So based on the files above, I want returned:
state
district
province
>
My plan was to use .split or .find but I can't figure out how locate
only the last underscore in the filename.
>
Anyone have any ideas?
>
Thanks.
R.D.

Hi,

Try splitting the string on "." and using rfind to find the last
instance of "_".

i.e.,
myStr = "wisconsin_stat e.txt"
pieces = myStr.split("." )
substr = pieces[0][pieces[0].rfind("_") + 1:]

--hiaips

[Simon Brunning]

Re: string splitting

On 16 Oct 2006 12:12:38 -0700, rdharles@gmail. com <rdharles@gmail .comwrote:

Hello,
I have thousands of files that look something like this:
>
wisconsin_state .txt
french_guiana_d istrict.txt
central_african _republic_provi nce.txt
>
I need to extract the string between the *last* underscore and the
extention.
So based on the files above, I want returned:
state
district
province
>
My plan was to use .split or .find but I can't figure out how locate
only the last underscore in the filename.

>>spam = 'central_africa n_republic_prov ince.txt'
>>spam.split('. ')[0].rsplit('_', 1)[-1]

'province'

--
Cheers,
Simon B
simon@brunningo nline.net

http://www.brunningonline.net/simon/blog/

[rdharles@gmail.com]

Re: string splitting

Much thanks for your replies hiaips & Simon!
R.D.

[bearophileHUGS@lycos.com]

Re: string splitting

A pair of solutions:

>>s = "central_africa n_republic_prov ince.txt"
>>s.rsplit("_ ", 1)[-1].split(".")[0]

'province'

>>import re
>>p = re.compile(r"_ ([^_]+) \.", re.VERBOSE)
>>s = """\

.... wisconsin_state .txt
.... french_guiana_d istrict.txt
.... central_african _republic_provi nce.txt"""

>>p.findall(s )

['state', 'district', 'province']

Bye,
bearophile

[stefaan]

Re: string splitting

Anyone have any ideas?

l = "wisconsin_stat e.txt"
l.split(".")[0].split("_")[-1]

Explanation:
-------------------
the split(".")[0] part takes everything before the "."

the split("_")[-1] part selects in the last element in the list of
substrings which are separated by "_"

[George Sakkis]

Re: string splitting

rdharles@gmail. com wrote:

Hello,
I have thousands of files that look something like this:
>
wisconsin_state .txt
french_guiana_d istrict.txt
central_african _republic_provi nce.txt
>
I need to extract the string between the *last* underscore and the
extention.
So based on the files above, I want returned:
state
district
province

def extract(s):
return s[s.rfind('_')+1: s.rfind('.')]


George