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POobject of type 'NoneType' has no len(), but I'm pretty sure my object is a valid list
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  1. POobject of type 'NoneType' has no len(), but I'm pretty sure my object is a valid list
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    copied!<p>The following module keeps failing for me, telling me that an object of type 'NoneType' has no len(), but it seems that the object being passed is a list, not an object of type 'NoneType'. I include the module and the output below.</p> <pre><code>def Purge_Polyploid_MisScores(dictOfLists): #print "dict getting passed to Purge_Polyploid_MisScores function", dictOfLists for x in dictOfLists.keys(): for y in range (0, len(dictOfLists[x])): print "x", x, " and y", y print dictOfLists[x][y] #if not dictOfLists[x][y]: #print "error at ",x,dictOfLists[str(int(x)-1)][0] if len(dictOfLists[x][y])&gt;3: try: dictOfLists[x][y]=dictOfLists[x][y].remove('**') except: for z in dictOfLists[x][y]: if dictOfLists[x][y].count(z)&gt;2: print "removed ",z," at dictOfLists[",x,"][",y,"]", dictOfLists[x][y] dictOfLists[x][y].remove(z) #I think this produces an error: dictOfLists[x][y]=dictOfLists[x][y].remove(z) print "now, it looks like", dictOfLists[x][y] if len(dictOfLists[x][y])&gt;3: print "The Length is still greater than 3! at dictOfLists[",x,"][",y,"]", dictOfLists[x][y] #print "the reason you have a polyploid is not a mis-score" #print "dictOfLists[",x,"][",y,"]",dictOfLists[x][y] print "Reached the end of the loop" return dictOfLists </code></pre> <p>Error/output preceding the error:</p> <pre><code>x 449 and y 100 ['Yellow submarine', '273', '273'] Reached the end of the loop x 449 and y 101 ['Heartland', '250', '250', '250'] removed 250 at dictOfLists[ 449 ][ 101 ] ['Heartland', '250', '250', '250'] now, it looks like ['Heartland', '250', '250'] Reached the end of the loop x 449 and y 102 ['Julia', '116', '119', '**'] Traceback (most recent call last): File "fast_run.py", line 11, in &lt;module&gt; sample_names_list_e1_keys_as_numbers_e2=transpose.combine_allele_report_pipeline_dict(pipeline_directory, keeplist_address, rejected_samples_address) File "/Users/markfisher/transpose.py", line 887, in combine_allele_report_pipeline_dict samples=Purge_Polyploid_MisScores(samples) File "/Users/markfisher/transpose.py", line 1332, in Purge_Polyploid_MisScores if len(dictOfLists[x][y])&gt;3: TypeError: object of type 'NoneType' has no len() </code></pre> <p>In other words, <code>['Julia', '116', '119', '**']</code> seems to be failing at if <code>len(['Julia', '116', '119', '**'])&gt;3</code>, and I have no idea why.</p> <p>I hope that I've equipped you guys with enough to see my error! Thanks!</p>
 

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