[Tutor] some string operations

[Reed O'Brien]

On Oct 4, 2008, at 4:03 AM, David wrote:

> Dear list,
>
> one of the exercises in Zelle's book is:
>
> given
>
> import string
> s1 = "spam"
> s2 = "ni!"
>
> show a Python expression that could construct the following result  
> by performing string operations on s1 and s2:
>
> "Spam Ni! Spam Ni! Spam Ni!".
>
> I have two solutions:
>
> a)
> (string.capitalize(s1) + " " + string.capitalize( s2) + "  " ) * 3
>
> b)
> "%s %s " % (string.capitalize(s1), string.capitalize(s2)) * 3
>
> Both seem to work, but they seem overly complex. Where could I  
> improve?
>
> Also, Python returns:
>
> 'Spam Ni! Spam Ni! Spam Ni! '
>
> Which is not exactly "Spam Ni! Spam Ni! Spam Ni!" (note the final  
> free space in my outcome). I am at a loss as to how to perfect my  
> answer with regard to this issue.

 >>>  s1, s2 = 'spam', 'ni!'
 >>> ' '.join([s.capitalize() for s in (s1, s2)] * 3)
'Spam Ni! Spam Ni! Spam Ni!'

HTH,
~ro
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