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copied!<p>Looking at your problem, <a href="http://docs.python.org/2/library/difflib.html#difflib.SequenceMatcher.ratio" rel="nofollow">difflib.SequenceMatcher.ratio()</a> might come handy.</p> <p>This nifty routine, takes two strings and calculates a similarity index in the range [0,1]</p> <h2>Quick Demo</h2> <pre><code>>>> for a,b in list(itertools.product(st, st)): print "Text 1 {}".format(a) print "Text 2 {}".format(b) print "Similarity Index {}".format(difflib.SequenceMatcher(None, a,b).ratio()) print '-'*80 Text 1 One day a man walked over the hill and saw the sun Text 2 One day a man walked over the hill and saw the sun Similarity Index 1.0 -------------------------------------------------------------------------------- Text 1 One day a man walked over the hill and saw the sun Text 2 One week a woman looked over a hill and saw the sun Similarity Index 0.831683168317 -------------------------------------------------------------------------------- Text 1 One day a man walked over the hill and saw the sun Text 2 One day a man walked over a hill and saw the sun Similarity Index 0.959183673469 -------------------------------------------------------------------------------- Text 1 One week a woman looked over a hill and saw the sun Text 2 One day a man walked over the hill and saw the sun Similarity Index 0.831683168317 -------------------------------------------------------------------------------- Text 1 One week a woman looked over a hill and saw the sun Text 2 One week a woman looked over a hill and saw the sun Similarity Index 1.0 -------------------------------------------------------------------------------- Text 1 One week a woman looked over a hill and saw the sun Text 2 One day a man walked over a hill and saw the sun Similarity Index 0.868686868687 -------------------------------------------------------------------------------- Text 1 One day a man walked over a hill and saw the sun Text 2 One day a man walked over the hill and saw the sun Similarity Index 0.959183673469 -------------------------------------------------------------------------------- Text 1 One day a man walked over a hill and saw the sun Text 2 One week a woman looked over a hill and saw the sun Similarity Index 0.868686868687 -------------------------------------------------------------------------------- Text 1 One day a man walked over a hill and saw the sun Text 2 One day a man walked over a hill and saw the sun Similarity Index 1.0 -------------------------------------------------------------------------------- </code></pre>

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