Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #45437

Re: spilt question

Show all headers | View raw

On 05/16/2013 11:15 AM, Chris Angelico wrote:
> On Fri, May 17, 2013 at 1:00 AM, loial <jldunn2000@gmail.com> wrote:
>> I want to split a string so that I always return everything BEFORE the LAST underscore
>>
>> HELLO_xxxxxxxx.lst         # should return HELLO
>> HELLO_GOODBYE_xxxxxxxx.ls  # should return HELLO_GOODBYE
>>
>> I have tried with rsplit but cannot get it to work.
>>
>> Any help appreciated
>
> Try with a limit:
>
>>>> "HELLO_GOODBYE_xxxxxxxx.ls".rsplit("_",1)
> ['HELLO_GOODBYE', 'xxxxxxxx.ls']
>>>> "HELLO_GOODBYE_xxxxxxxx.ls".rsplit("_",1)[0]
> 'HELLO_GOODBYE'
>
> You can easily get docs on it:
>
>>>> help("".rsplit)
> Help on built-in function rsplit:
>
> rsplit(...)
>      S.rsplit(sep=None, maxsplit=-1) -> list of strings
>
>      Return a list of the words in S, using sep as the
>      delimiter string, starting at the end of the string and
>      working to the front.  If maxsplit is given, at most maxsplit
>      splits are done. If sep is not specified, any whitespace string
>      is a separator.
>
> ChrisA
>

Now that you've all done his homework for him, see if The OP can spot 
the one case where that won't work.  It's easy to test for, but still 
important to get right (for some definition of right).

-- 
DaveA

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

spilt question loial <jldunn2000@gmail.com> - 2013-05-16 08:00 -0700
  Re: spilt question Walter Hurry <walterhurry@lavabit.com> - 2013-05-16 15:10 +0000
  Re: spilt question Fábio Santos <fabiosantosart@gmail.com> - 2013-05-16 16:14 +0100
  Re: spilt question Chris Angelico <rosuav@gmail.com> - 2013-05-17 01:15 +1000
  Re: spilt question Dave Angel <davea@davea.name> - 2013-05-16 11:20 -0400
  Re: spilt question Tim Chase <python.list@tim.thechases.com> - 2013-05-16 10:23 -0500
  Re: spilt question Ned Batchelder <ned@nedbatchelder.com> - 2013-05-16 11:22 -0400
  Re: spilt question Dave Angel <davea@davea.name> - 2013-05-16 11:32 -0400

csiph-web