socket.error: [Errno 98] Address already in use

from flask import Flask, request
import OAuth2Util
import praw
import time

app = Flask(__name__)

CLIENT_ID = 'myclientid'
CLIENT_SECRET = 'myclientsecret'
REDIRECT_URI = 'http://127.0.0.1:65010/authorize_callback'



@app.route('/')
def homepage():
    link_no_refresh = r.get_authorize_url('UniqueKey')
    link_refresh = r.get_authorize_url('DifferentUniqueKey',
                                       refreshable=True)
    link_no_refresh = "<a href=%s>link</a>" % link_no_refresh
    link_refresh = "<a href=%s>link</a>" % link_refresh
    text = "First link. Not refreshable %s</br></br>" % link_no_refresh
    text += "Second link. Refreshable %s</br></br>" % link_refresh
    return text

@app.route('/authorize_callback')
def authorized():
    state = request.args.get('state', '')
    code = request.args.get('code', '')
    info = r.get_access_information(code)
    user = r.get_me()
    variables_text = "State=%s, code=%s, info=%s." % (state, code,
                                                      str(info))
    text = 'You are %s and have %u link karma.' % (user.name,
                                                   user.link_karma)
    back_link = "<a href='/'>Try again</a>"
    return variables_text + '</br></br>' + text + '</br></br>' + back_link

if __name__ == '__main__':
    r = praw.Reddit(user_agent='custom data mining framework',
    site_name='lamiastella')

    r.set_oauth_app_info(CLIENT_ID, CLIENT_SECRET, REDIRECT_URI)
    app.run(debug=True, port=65010)
    o = OAuth2Util.OAuth2Util(r)
    o.refresh(force=True)
    while True:
        print(r.get_me().comment_karma)
        time.sleep(3600)




python example_webserver.py
Traceback (most recent call last):
  File "example_webserver.py", line 43, in <module>
    app.run(debug=True, port=65010)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 843, in run
    run_simple(host, port, self, **options)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 677, in run_simple
    s.bind((hostname, port))
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use