fb.py

import requests
import json

TOKEN = 'facebook token with permissions to post on wall stream'

def get_posts():
    """Returns dictionary of id, first names of people who posted on my wall between start and end time"""
    query = ("SELECT post_id, actor_id, message FROM stream WHERE "
             "filter_key = 'others' AND actor_id!='#your_fb_id#' AND source_id = me()"
             "AND created_time = #start_timestamp# LIMIT 200")
    payload = {'q': query, 'access_token': TOKEN}
    r = requests.get('https://graph.facebook.com/fql', params=payload)
    result = json.loads(r.text)
    return result['data']

def commentall(wallposts):
    """Comments thank you on all posts"""
    #TODO convert to batch request later

    for wallpost in wallposts:
        r = requests.get('https://graph.facebook.com/%s' %
                         wallpost['actor_id'])

        url = 'https://graph.facebook.com/%s/comments' % wallpost['post_id']
        user = json.loads(r.text)
        message = 'Thanks %s :)' % user['first_name']
        payload = {'access_token': TOKEN, 'message': message}

        s = requests.post(url, data=payload)
        print "Wall post %s done" % wallpost['post_id']

if __name__ == '__main__':
     commentall(get_posts())