page through any facebook graph request

page_graph.py

# usage:
#   python page_graph.py https://graph.facebook.com/some/path?access_token=x
# ... where some/path is the thing you want to get from the graph api, and 'x' is a
# valid access token (such as can be obtained from  http://developers.facebook.com/docs/reference/api/)
# redefine the 'tester' function to change what happens with each data item in the
# response

import json
import urllib
import time

def page_graph(url, callback, maxpages=10):
  resp = urllib.urlopen(url)
  data = json.loads(resp.read())
  for item in data['data']:
    callback(item)
  if 'paging' in data and 'next' in data['paging'] and maxpages > 1:
    time.sleep(0.5)
    page_graph(data['paging']['next'], callback, maxpages - 1)

if __name__ == '__main__':

  import sys

  def tester(item):
    if 'message' in item:
      print item['message'].encode('ascii', 'replace')

  url = sys.argv[1]

  page_graph(url, tester)