trailing newline in string.splitfields()

Bengt Richter bokr at oz.net
Wed Sep 4 01:45:17 CEST 2002


On Tue, 03 Sep 2002 14:17:10 GMT, Micah Mayo <astrophels at yahoo.com> wrote:

>I was splitting up some fields in a textfile using string.split, which 
>works fine, but that it usee ' ' as the delimiter. I've found that some 
>of the things I want to split include a space or two, so I've gone to 
>using string.splitfields, which also works fine, but for one thing.
AFAICT string.splitfields is now an alias for string.split. The docs say
"""
splitfields(s[, sep[, maxsplit]]) 
      This function behaves identically to split(). (In the past, split() was only used
      with one argument, while splitfields() was only used with two arguments.) 
"""

>Unlike string.split() it also grabs the newlne('\n') at the end of each 
>line.
>
>The way I've worked around this is as such:
>
>var1,var2,var3 = string.splitfields(stringtosplit,',')
>list.append(var1)
>list.append(var2)
>list.append(var3[:-1])
 ^^^^--you really ought not to use builtin names for variables ;-)

If you are not otherwise using the three var's, you could write

    myList.extend(stringtosplit.strip().split(','))

if you don't care about leading or trailing whitespace. Otherwise, to duplicate
what you are doing, you could write

    myList.extend(stringtosplit[:-1].split(','))

e.g.,

 >>> myList = list('abc')
 >>> myList
 ['a', 'b', 'c']
 >>> stringtosplit = '  <-2sp..1sp-> ,no_spaces,inside spaces and end.\n'
 >>> myList.extend(stringtosplit[:-1].split(','))
 >>> myList
 ['a', 'b', 'c', '  <-2sp..1sp-> ', 'no_spaces', 'inside spaces and end.']

>
>So, I slice of the character, easy enough. And I'm generally satisfied 
>with that - but I was wondering if there may be, for the cause of more 
>beautiful code, a way to tell string.splitfields() to do it automatically.
>
Regular expressions will let you do things like splitting on comma with
optional white space on either side of the comma, but not touching white
space elsewhere. Or ignore delimiters inside of quotations, etc. You might
not need those options every time, but sometimes you do.

Regards,
Bengt Richter



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