rank()_01

if command.startswith('/rank '):
    rank(msg)

def rank(msg):
    chat_id = msg['chat']['id']
    command = msg['text']

    user = msg['text'][6:]
    graphUrl = 'https://www.website.com/servlet/graph/' + user + '-in_US.png'
    print graphUrl

    theGraph = urllib2.urlopen(graphUrl)

    bot.sendPhoto(chat_id, theGraph, caption=('rank graph for ' + user + '.'))

# Error:
# 2016-12-30T17:17:50.803142+00:00 app[worker.1]: TelegramError: (u'Bad Request: Photo has unsupported extension. Use one of .jpg, .jpeg, # .gif, .png, .tif or .bmp', 400, {u'ok': False, u'description': u'Bad Request: Photo has unsupported extension. Use one of .jpg, .jpeg, # .gif, .png, .tif or .bmp', u'error_code': 400})