title: except Exception, ex: ^ SyntaxError: invalid syntax
body: <p>I am trying to run a flask socketio example, but don't understand this error :</p>
  
  <pre><code>C:\Users\alotfi
  λ python -V
    Python 2.7.7
  
  C:\Users\alotfi
  λ cd C:\Users\alotfi\PycharmProjects\websocketSliders
  
  C:\Users\alotfi\PycharmProjects\websocketSliders
  λ env2\Scripts\activate
  (env2) C:\Users\alotfi\PycharmProjects\websocketSliders
  λ python app.py
  Traceback (most recent call last):
   File "app.py", line 2, in &lt;module&gt;
   from flask.ext.socketio import SocketIO, emit
  File "&lt;frozen importlib._bootstrap&gt;", line 1567, in _find_and_load
  File "&lt;frozen importlib._bootstrap&gt;", line 1534, in _find_and_load_unlocked
  File "C:\Users\alotfi\PycharmProjects\websocketSliders\env2\lib\site-  packages\flask\exthook.py", line 62, in load_module
    __import__(realname)
   File "C:\Users\alotfi\PycharmProjects\websocketSliders\env2\lib\site-  packages\flask_socketio\__init__.py", line 1, in &lt;module&gt;
  from gevent import monkey
  File "C:\Users\alotfi\PycharmProjects\websocketSliders\env2\lib\site-packages\gevent\__init__.py", line 36, in &lt;module&gt;
  from gevent.hub import get_hub, iwait, wait
  File "C:\Users\alotfi\PycharmProjects\websocketSliders\env2\lib\site- packages\gevent\hub.py", line 282
  except Exception, ex:
                  ^
  </code></pre>
  
  <p>SyntaxError: invalid syntax</p>
  
  <p>Thanks.</p>