simple python script to fetch an access token for a Facebook application (not a user token)

facebook_app_token.py

# fetch an access token for a Facebook application
#
# run like so:
#
# $ python facebook_app_token.py --app_id=<your app id> --secret=<your secret>
#
# ... where <your app id> is your Facebook application ID, and <your secret>
# is the application secret for that application (both can be retrieved from
# the Facebook developer app)

import urllib

def fetch_app_access_token(fb_app_id, fb_app_secret):
  resp = urllib.urlopen(
    'https://graph.facebook.com/oauth/access_token?client_id=' +
    fb_app_id + '&client_secret=' + fb_app_secret +
    '&grant_type=client_credentials')
  if resp.getcode() == 200:
    return resp.read().split("=")[1]
  else:
    return None

if __name__ == '__main__':
  from optparse import OptionParser
  parser = OptionParser()
  parser.add_option('--app_id', dest='fb_app_id')
  parser.add_option('--secret', dest='fb_app_secret')
  (options, args) = parser.parse_args()

  print fetch_app_access_token(options.fb_app_id, options.fb_app_secret)

How can i get a user token using a parser like this?

gets me urllib.error.HTTPError: HTTP Error 500: Internal Server Error

so for what the script?

you can get access toking by this ??

Seems like issue patched.

How can I get user access_token using the same technique?