Re: [Tutor] can this be done easerly

[Roelof Wobben]

 

> Subject: Re: [Tutor] can this be done easerly
> From: evert....@gmail.com
> Date: Mon, 30 Aug 2010 12:04:08 +0200
> CC: tutor@python.org
> To: rwob...@hotmail.com
> 
> > For a exerise I made this one :"
> > 
> > import string
> > def extract_words(s):
> > """
> > >>> extract_words('Now is the time! "Now", is the time? Yes, now.')
> > ['now', 'is', 'the', 'time', 'now', 'is', 'the', 'time', 'yes', 'now']
> > >>> extract_words('she tried to curtsey as she spoke--fancy')
> > ['she', 'tried', 'to', 'curtsey', 'as', 'she', 'spoke', 'fancy']
> > """
> > word= ""
> > s=string.lower(s)
> > for char in s :
> > if ord(char) >=65 and ord(char) <= 122 or ord(char)==32 or ord(char)==45:
> > word= word + char 
> > word=string.split(word, "--")
> > word=string.join(word, " ")
> > word=word.replace (" ", " ")
> > word=string.split(word, " ")
> > return word
> > 
> > if __name__ == '__main__':
> > import doctest
> > doctest.testmod()
> > 
> > But now I wonder if this can be done more easerly ?
> 
> Using regular expressions could work, depending on your view of regular 
> expressions being 'easy':
> 
> import re
> re.split('\W+', s.lower()) 
> 
> will do most of what you want (though you'll end up with the occasional empty 
> string.
> 
> Evert
> 

 

Hello Evert, 

 

Thank you for the answer.
I following this tutorial 
(http://openbookproject.net/thinkcs/python/english2e/) and till chapter 10 
there is no talking about regular expressions.
So this is not easy for me.

But thanks , I will read on regular expressions so I understand that one too.

 

Roelof


 
                                          
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