title: Is there recommended way to run async wsgi on Python3?
body: <p>On Python3, I can't use gevent as wsgi.<br>
  Is there any way to run async wsgi like gevent on Python3.<br>
  I uses wsgi as gunicorn and runs on CentOS 6.6.</p>
  
  <p>When I tried gevent 1.1b3 with gunicorn, I got these error.</p>
  
  <pre><code>$ python manage.py gunicorn -k gevent
  [2015-08-19 14:20:48 +0900] [13636] [INFO] Starting gunicorn 19.3.0
  [2015-08-19 14:20:48 +0900] [13636] [INFO] Listening at: http://127.0.0.1:8000 (13636)
  [2015-08-19 14:20:48 +0900] [13636] [INFO] Using worker: gevent
  [2015-08-19 14:20:48 +0900] [13640] [INFO] Booting worker with pid: 13640
  [2015-08-19 14:20:48 +0900] [13640] [ERROR] Exception in worker process:
  Traceback (most recent call last):
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/arbiter.py", line 507, in spawn_worker
      worker.init_process()
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/workers/ggevent.py", line 185, in init_process
      self.patch()
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/workers/ggevent.py", line 74, in patch
      _sock=s))
  TypeError: __init__() got an unexpected keyword argument '_sock'
  Traceback (most recent call last):
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/arbiter.py", line 507, in spawn_worker
      worker.init_process()
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/workers/ggevent.py", line 185, in init_process
      self.patch()
    File "/home/vagrant/.pyenv/versions/3.4.3/lib/python3.4/site-packages/gunicorn/workers/ggevent.py", line 74, in patch
      _sock=s))
  TypeError: __init__() got an unexpected keyword argument '_sock'
  [2015-08-19 14:20:48 +0900] [13640] [INFO] Worker exiting (pid: 13640)
  [2015-08-19 14:20:48 +0900] [13636] [INFO] Shutting down: Master
  [2015-08-19 14:20:48 +0900] [13636] [INFO] Reason: Worker failed to boot.
  </code></pre>