human
Solve the following python programming problem given the following code:
def facebook_request(self, method, callback, **args) : 
    'Makes a Facebook API REST request.

        We automatically include the Facebook API key and signature, but
        it is the callers responsibility to include \'session_key\' and any
        other required arguments to the method.

        The available Facebook methods are documented here:
        http://wiki.developers.facebook.com/index.php/API

        Here is an example for the stream.get() method::

            class MainHandler(tornado.web.RequestHandler,
                              tornado.auth.FacebookMixin):
                @tornado.web.authenticated
                @tornado.web.asynchronous
                def get(self):
                    self.facebook_request(
                        method="stream.get",
                        callback=self.async_callback(self._on_stream),
                        session_key=self.current_user["session_key"])

                def _on_stream(self, stream):
                    if stream is None:
                       # Not authorized to read the stream yet?
                       self.redirect(self.authorize_redirect("read_stream"))
                       return
                    self.render("stream.html", stream=stream)

        ' 
    self.require_setting ('facebook_api_key', 'Facebook Connect') 
    self.require_setting ('facebook_secret', 'Facebook Connect') 
    if (not method.startswith ('facebook.')) : 
        method = ('facebook.' + method) 
args ['api_key'] = callback.settings ['facebook_api_key'] 
    args ['v'] = '1.0' 
    args ['method'] = method 
    args ['call_id'] = str (long ((time.time () * 1000000.0))) 
    args ['format'] = 'json' 
    args ['sig'] = self._signature (args) 
    url = ('http://api.facebook.com/restserver.php?' + urllib_parse.urlencode (args)) 
    http = self.get_auth_http_client () 
    http.fetch (url, callback = self.async_callback (self._parse_response, callback)) 

    
    

    Fix the buggy line: args ['api_key'] = callback.settings ['facebook_api_key']
assistant
#Here is Python program to fix the buggy line: args ['api_key'] = callback.

args ['api_key'] = self.settings ['facebook_api_key']