问Tweepy流API在启用地理的tweet上返回坐标"None“

EN

from tweepy.streaming import StreamListener
from tweepy import OAuthHandler
from tweepy import Stream
import random
import time
import MySQLdb
import json

consumer_key="XXX"
consumer_secret="XXX"

access_token="XXX"
access_token_secret="XXX"

db=MySQLdb.connect(host='localhost', user='XXX', passwd='XXX', db='twitter')
db.set_character_set('utf8')

Coords = dict()
Place = dict()
PlaceCoords = dict()
XY = []
curr=db.cursor()

class StdOutListener(StreamListener):
    """ A listener handles tweets that are the received from the stream.
    This is a basic listener that inserts tweets into MySQLdb.
    """
    def on_status(self, status):

        print "Tweet Text: ",status.text

        text = status.text

        print "Time Stamp: ",status.created_at

        print "Time Stamp: ",status.created_at

        print "Source: ",status.source

        source = status.source

        print "Author: ",status.user.screen_name

        author = status.user.screen_name

        print "Name: ",status.user.name

        name = status.user.name

        print "Time Zone: ",status.user.time_zone

        time_zone = status.user.time_zone

        print "User Language: ",status.user.lang

        user_language = status.user.lang

        print "Followers: ",status.user.followers_count

        followers = status.user.followers_count

        print "User Description: ",status.user.description

        user_description = status.user.description

        print "Geo Enabled: ",status.user.geo_enabled

        geo_enabled = status.user.geo_enabled

        print "Friends: ",status.user.friends_count

        friends = status.user.friends_count

        print "Retweets: ",status.retweet_count

        retweets = status.retweet_count

        print "Location: ",status.user.location

        location = status.user.location

        print "ID: ",status.user.id_str

        user_id = status.user.id_str

        print "Coordinates: ",status.coordinates

        coordinates = status.coordinates

        print "Place: ",status.place

        place = status.place