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POPython mysterious error
 

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  1. POPython mysterious error
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    <p>So I am working on a program to create portmanteaus. I have the code and functions I need, and I have put them together. </p> <p>Here is the code:</p> <pre><code>def portmanteauscore(start, mid, end): totallen = len(start) + len(mid) + len(end) return totallen - abs((len(start)/totallen) - len(start)) - abs((len(mid)/totallen) - len(mid)) - abs((len(end)/totallen) - len(end)) def portmanteaugenerator(word1, word2, words): mid = longest_common_substring(word1, word2) start = word1[:word1.index(mid)] end = word2[len(mid):] if start + mid in words and mid + end in words: return start, mid, end def natalie(words): "Find the best Portmanteau word formed from any two of the list of words." wordpermutations = list(itertools.permutations(words)) maxscore, bestnatalie = 0, '' for perm in wordpermutations: start, mid, end = portmanteaugenerator(perm[0], perm[1], words) if portmanteauscore(start, mid, end) &gt; maxscore: bestnatalie, maxscore = start + mid + end, portmanteauscore(start, mid, end) print bestnatalie return bestnatalie def longest_common_substring(s1, s2): m = [[0] * (1 + len(s2)) for i in xrange(1 + len(s1))] longest, x_longest = 0, 0 for x in xrange(1, 1 + len(s1)): for y in xrange(1, 1 + len(s2)): if s1[x - 1] == s2[y - 1]: m[x][y] = m[x - 1][y - 1] + 1 if m[x][y] &gt; longest: longest = m[x][y] x_longest = x else: m[x][y] = 0 return s1[x_longest - longest: x_longest] </code></pre> <p>But when I run the code, I keep getting this error message, </p> <pre><code>Traceback (most recent call last): File "vm_main.py", line 33, in &lt;module&gt; import main File "/tmp/vmuser_ijxrjleuxj/main.py", line 107, in &lt;module&gt; print test_natalie() File "/tmp/vmuser_ijxrjleuxj/main.py", line 87, in test_natalie assert natalie(['adolescent', 'scented', 'centennial', 'always', 'ado']) in ('adolescented','adolescentennial') File "/tmp/vmuser_ijxrjleuxj/main.py", line 67, in natalie start,mid,end=portmanteaugenerator(perm[0],perm[1],words) TypeError: 'NoneType' object is not iterable </code></pre> <p>This occurs when I return the start,mid,and end variables for the portmanteau generator. When given a list of words, it should return a portmanteau from two words that is the best according to portmanteau score.</p> <p>But I keep getting this type error for some reason. I have tried making start,mid,end a list and it still fails to run. Can you please help me? </p>
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    1. USManav Dutta
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    1. COMore spaces! Spaces after commas and around binary operators would make this a lot more readable.
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      1. USuser2357112
    2. COIronic when talking about a portmanteaugenerator ;)
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      1. USicedwater
 

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