change the first letter into uppercase (ask)

[MRAB]

On 2012-10-21 00:14, contro opinion wrote:
> the pattern `re.compile(".(?#nyh2p){0,1}")`  , make me confused,
> can you explain how it  can match the first letter of every word?
>
It matches all of the characters, plus an empty string at the end. It's
equivalent to:

     result = ""

     for c in "a test of capitalizing":
         result = (result + c).title()

     result = (result + "").title()

or:

     result = "a test of capitalizing".title()

but somewhat slower...

>
> 2012/10/20 Dennis Lee Bieber <wlfraed at ix.netcom.com
> <mailto:wlfraed at ix.netcom.com>>
>
>     On Sat, 20 Oct 2012 01:03:46 -0400, Zero Piraeus <schesis at gmail.com
>     <mailto:schesis at gmail.com>>
>     declaimed the following in gmane.comp.python.general:
>
>      > :
>      >
>      > On 20 October 2012 00:09, contro opinion <contropinion at gmail.com
>     <mailto:contropinion at gmail.com>> wrote:
>      > > how can i use  regular expression  in  python  to change the string
>      > > "a test of capitalizing"
>      > > into
>      > > "A Test Of Capitalizing"?
>      >
>      > >>> import re
>      > >>> pattern = re.compile(".(?#nyh2p){0,1}")
>      > >>> result = ""
>      > >>> f = str.title
>
>              f = str.capitalize
>
>      > >>> for match in re.findall(pattern, "a test of capitalizing"):
>      > ...   result = f(result + match)
>
>              result = result + f(match)
>
>              Or closer... Don't both with f and str.capitalize
>
>              result = result + match.capitalize()
>
>      > ...
>      > >>> print(result)
>      > A Test Of Capitalizing
>      > >>>
>      >
>
>
>      >>> "a test of capitalizing".title()
>     'A Test Of Capitalizing'
>      >>>
>
>              Not to be confused with
>
>      >>> "a test of capitalizing".capitalize()
>     'A test of capitalizing'
>      >>>
>