'NoneType' Error!

[Sagar14]

Hi,

I'm at present working on extracting data from various online news sites, and then analyzing it. The code is given below. But when I'm writing this last code, the following error is coming:

>>> import newsfeatures
>>> allw,artw,artt= newsfeatures.getarticlewords( )
>>> wordmatrix,wordvec= newsfeatures.makematrix(allw,artw)

Error:

Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
wordmatrix,wordvec= newsfeatures.makematrix(allw,artw)
TypeError: 'NoneType' object is not iterable

Can anybody help me to find why this error is coming.

Thank you.
Sagar

import feedparser
import re
feedlist=['http://today.reuters.com/rss/topNews',
'http://today.reuters.com/rss/domesticNews',
'http://today.reuters.com/rss/worldNews',
'http://hosted.ap.org/lineups/TOPHEADS-rss_2.0.xml',
'http://hosted.ap.org/lineups/USHEADS-rss_2.0.xml',
'http://hosted.ap.org/lineups/WORLDHEADS-rss_2.0.xml',
'http://hosted.ap.org/lineups/POLITICSHEADS-rss_2.0.xml',
'http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml',
'http://www.nytimes.com/services/xml/rss/nyt/International.

xml',
'http://news.google.com/?output=rss',
'http://feeds.salon.com/salon/news',
'http://www.foxnews.com/xmlfeed/rss/0,4313,0,00.rss',
'http://www.foxnews.com/xmlfeed/rss/0,4313,80,00.rss',
'http://www.foxnews.com/xmlfeed/rss/0,4313,81,00.rss',
'http://rss.cnn.com/rss/edition.rss',
'http://rss.cnn.com/rss/edition_world.rss',
'http://rss.cnn.com/rss/edition_us.rss']
def stripHTML(h):
    p=''
    s=0
    for c in h:
        if c=='<': s=1
        elif c=='>':
            s=0
            p+=' '
        elif s==0: p+=c
        return p
def separatewords(text):
    splitter=re.compile('\\W*')
    return[s.lower() for s in splitter.split(text) if len

(s)>3]
def getarticlewords( ):
    allwords={}
    articlewords=[]
    articletitles=[]
    ec=0
# Loop over every feed
    for feed in feedlist:
        f=feedparser.parse(feed)
# Loop over every article
    for e in f.entries:
# Ignore identical articles
        if e.title in articletitles:continue
# Extract the words
        txt=e.title.encode('utf8')+stripHTML

(e.description.encode('utf8'))
        words=separatewords(txt)
        articlewords.append({})
        articletitles.append(e.title)
# Increase the counts for this word in allwords and in 

articlewords
        for word in words:
           allwords.setdefault(word,0)
           allwords[word]+=1
           articlewords[ec].setdefault(word,0)
           articlewords[ec][word]+=1
        ec+=1
    return allwords,articlewords,articletitles
def makematrix(allw,articlew):
    wordvec=[]
    for w,c in allw.items():
        if c>3 and c<len(articlew)*0.6:
            wordvec.append(w)
            l1=[[(word in f and f[word] or 0) for word in 

worddev] for f in articlew]
            return l1,wordvec

[TrustyTony]

Your makematrix has inconsistent number of result two tuple or None. It gives only None result and the error comes. Either put the result first in single variable and only if it is not None, extract the parts of answer or change the definition:

def makematrix(allw,articlew):
    wordvec=[]
    for w,c in allw.items():
        if c>3 and c<len(articlew)*0.6:
            wordvec.append(w)
            l1=[[(word in f and f[word] or 0) for word in 

worddev] for f in articlew]
            return l1,wordvec
    return None,None ## to be concistent number of results

[Sagar14]

Thank you for your suggestion. I'll try out your solution.

Regards,
Sagar