Splitting text into sentences using Python : <p>I'm trying to split a text into sentences, whenever a terminal punctuation mark ( '.', '!', '?') appears. for instance if I have the following text :</p>

<blockquote>
  <p>Recognizing the rising opportunity Jerusalem Venture Partners opened
  up their Cyber Labs incubator, giving a home to many of the city’s
  promising young <strong>companies.</strong> International corporates like EMC have also
  established major centers in the park, leading the way for others to
  <strong>follow!</strong> On a visit last June, the park had already grown to two
  buildings with the ground being broken for the construction of more in
  the near <strong>future.</strong> this is really <strong>interesting!</strong> <strong>what do you think?</strong></p>
</blockquote>

<p>This should be splitted into 5 sentences (see the bold words above, as these words end with a punctuation mark).</p>

<p>Here's my code: </p>

<pre><code># split on: '.+'
    splitted_article_content = []
    # article_content contains all the article's paragraphs
    for element in article_content:
        splitted_article_content = splitted_article_content +re.split(".(?='.'+)", element)

    # split on: '?+'
    splitted_article_content_2 = []
    for element in splitted_article_content:
        splitted_article_content_2 = splitted_article_content_2 + re.split(".(?='?'+)", element)

    # split on: '!+'
    splitted_article_content_3 = []
    for element in splitted_article_content_2:
            splitted_article_content_3 = splitted_article_content_3 + re.split(".(?='!'+)", element)
</code></pre>

<p>My question is, is there any other efficient way to do the following, <strong>without</strong> using any external libraries ?</p>

<p>Thanks for the help guys.</p>
