[Tutor] Splitting at a capital letter in a string

[Kent Johnson]

You can use a "positive lookbehind assertion" to avoid matching the first 
letter of the string. This says, match any capital letter that is preceded 
by any character:
 >>> import re
 >>> s='HiImAStringWithCaps'
 >>> re.sub(r'(?<=.)([A-Z])', r' \1', s)
'Hi Im A String With Caps'

If you really want to split the string, use re.findall:
 >>> re.findall('[A-Z][^A-Z]*', s)
['Hi', 'Im', 'A', 'String', 'With', 'Caps']

Kent

At 08:14 PM 10/29/2004 -0700, Bill Campbell wrote:
>On Fri, Oct 29, 2004, Douglas N. Shawhan wrote:
> >Is there a way to use the string module to split a string at a capital,
> >so that:
> >
> >HiImAStringWithCaps
> >
> >is rendered
> >
> >Hi Im A String With Caps
> >
> >I looked at the re module, and it looks as if it could be used for such
> >shenannigans...
>
>One way to do this would be:
>
>import re
>pat = re.compile('([A-Z])')
>s = pat.sub(r' \1', 'HiImAStringWithCaps').strip()
>
>The strip call gets rid of the first blank inserted.
>
>Bill
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