python - Iterate Nonetype object -

i want go deep statistic data, , write code.

import urllib2 import htmlparser  response = urllib2.urlopen('http://www.eia.gov/dnav/pet/hist/leafhandler.ashx?n=pet&s=mcestus1&f=m') data = response.read()   class tableparser(htmlparser.htmlparser):     def __init__(self):         htmlparser.htmlparser.__init__(self)         self.in_td = false      def handle_starttag(self, tag, attrs):         if tag == 'td':             self.in_td = true      def handle_data(self, data):         if self.in_td:             print data      def handle_endtag(self, tag):         self.in_td = false  p = tableparser() raw_data = p.feed(data)   raw_list = []  string in raw_data:      raw_list.append(string)   print raw_list 

some output script/

2015 421,472 448,039 474,815 483,379 479,335 469,539 455,470 457,810 460,786 486,700  - release date: 12/31/2015 next release date: 1/29/2016 traceback (most recent call last):   file "firstdata.py", line 28, in <module>     string in raw_data: typeerror: 'nonetype' object not iterable 

that work, cant iterate through nonetype object, first.

and second how can put data in pandas graph month , quantity?

looks parser parses need data out of parser via other method return value of p.feed(data) going none. how accumulating in list property of parser object:

import urllib2 import htmlparser  response = urllib2.urlopen('http://www.eia.gov/dnav/pet/hist/leafhandler.ashx?n=pet&s=mcestus1&f=m') data = response.read()   class tableparser(htmlparser.htmlparser):     def __init__(self):         htmlparser.htmlparser.__init__(self)         self.in_td = false         self.raw_data = []      def handle_starttag(self, tag, attrs):         if tag == 'td':             self.in_td = true      def handle_data(self, data):         if self.in_td:             print data             self.raw_data.append(data)      def handle_endtag(self, tag):         self.in_td = false  p = tableparser() p.feed(data)  print p.raw_data 

untested.