Python : TypeError: 'NoneType' object has no attribute '__getitem__' -


when run python code through terminal m getting error :

def gplag(text,encode=false):         import urllib, urllib2, json          if encode == true:             text = text.encode('utf-8')          query = urllib.quote_plus(text)         base_url = 'http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q='         url = base_url + '%22' + query + '%22'         request = urllib2.request(url,none)         response = urllib2.urlopen(request)         result = json.load(response)         output = []          if result['responsedata']['results'] != []:             firstmatch = result['responsedata']['results'][0]             output.append(firstmatch['title'])             output.append(firstmatch['visibleurl'])             output.append(firstmatch['content'])          return output          def callgplag(n):             s in n:                 outcome = gplag(s,encode=true)

it gives;

typeerror: 'nonetype' object has no attribute '__getitem__'

in if result['responsedata']['results'] line. here traceback:

traceback (most recent call last):   ... in <module> gplagfile(sys.argv[1])   ... in gplagfile outcome = gplag(s,encode=true)   ... in gplag if 'results' in result['responsedata']:  typeerror: argument of type 'nonetype' not iterable

replace line :

if result['responsedata']['results'] != []:

by 

if ( len(result) ,     'responsedata' in result ,      'results' in result['responsedata'] ,           result['responsedata']['results'] != []):

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