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POstopword removal using python
 

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  1. POstopword removal using python
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    <p>All,</p> <p>I have some text that I need to clean up and I have a little algorithm that "mostly" works. </p> <pre><code>def removeStopwords(self, data): with open(r'stopwords.txt') as stopwords: wordList = [] for i in stopwords: wordList.append(i.strip()) charList = list(data) cat = ''.join(char for char in charList if not char in wordList).split() return ' '.join(cat) </code></pre> <p>Take the first line on this page. <a href="http://en.wikipedia.org/wiki/Paragraph" rel="nofollow">http://en.wikipedia.org/wiki/Paragraph</a> and remove all the characters that we are not interested in which in this case are all the non-alphanumeric chars. </p> <blockquote> <p>A paragraph (from the Greek paragraphos, "to write beside" or "written beside") is a self-contained unit of a discourse in writing dealing with a particular point or idea. A paragraph consists of one or more sentences.[1][2] The start of a paragraph is indicated by beginning on a new line. Sometimes the first line is indented. At various times, the beginning of a paragraph has been indicated by the pilcrow: ¶.</p> </blockquote> <p>The output looks pretty good except that some of the words are recombined incorrectly and I am unsure how to correct it.</p> <blockquote> <p>A paragraph from the Greek paragraphos to write beside or written beside is a selfcontained unit</p> </blockquote> <p>Note the word "selfcontained" was "self-contained".</p> <p>EDIT: Contents of the stopwords file which is just a bunch of chars. </p> <blockquote> <p>! $ % ^ , &amp; * ( ) { } [ ] &lt; </p> <p>, . / | \ ? ~ ` : ; "</p> </blockquote> <p>Turns out I don't need a list of words at all because I was only really trying to remove characters which in this case were punctuation marks.</p> <pre><code> cat = ''.join(data.translate(None, string.punctuation)).split() print ' '.join(cat).lower() </code></pre>
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    1. COWhat is the contents of stopwords.txt? A list of punctuation symbols, rather then, well, stop words?
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    2. COI usually think of "stopword removal" as removing actual words (such as "of" or "the"); but it seems like what you're trying to do here is actually remove specific characters (eg to strip punctuation). Is that correct?
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      1. USEdward Loper
    3. CO@Wooble stopwords is full of non-alphanumeric characters or everything other than letters and numbers.
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