replace only full words

Newsgroups	comp.lang.python
Date	2013-09-28 09:11 -0700
Message-ID	<bd024ecf-2428-4d6a-bc0c-163112b31842@googlegroups.com> (permalink)
Subject	replace only full words
From	cerr <ron.eggler@gmail.com>

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Hi,

I have a list of sentences and a list of words. Every full word that appears within sentence shall be extended by <WORD> i.e. "I drink in the house." Would become "I <drink> in the <house>." (and not "I <d<rink> in the <house>.")I have attempted it like this:
  for sentence in sentences:
    for noun in nouns:
      if " "+noun+" " in sentence or " "+noun+"?" in sentence or " "+noun+"!" in sentence or " "+noun+"." in sentence:
	sentence = sentence.replace(noun, '<' + noun + '>')
      
    print(sentence)

but what if The word is in the beginning of a sentence and I also don't like the approach using defined word terminations. Also, is there a way to make it faster?

Thanks

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replace only full words cerr <ron.eggler@gmail.com> - 2013-09-28 09:11 -0700
  Re: replace only full words Tim Chase <python.list@tim.thechases.com> - 2013-09-28 11:54 -0500
    Re: replace only full words cerr <ron.eggler@gmail.com> - 2013-09-28 10:43 -0700
      Re: replace only full words MRAB <python@mrabarnett.plus.com> - 2013-09-28 19:07 +0100
        Re: replace only full words cerr <ron.eggler@gmail.com> - 2013-09-28 11:25 -0700
      Re: replace only full words Tim Chase <python.list@tim.thechases.com> - 2013-09-28 13:17 -0500
        Re: replace only full words cerr <ron.eggler@gmail.com> - 2013-09-28 11:25 -0700
  Re: replace only full words MRAB <python@mrabarnett.plus.com> - 2013-09-28 18:00 +0100
    Re: replace only full words Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2013-09-28 20:37 +0300

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