
Traceback (most recent call last):


 "<string>", line 1, in <module>


 "C:\Users\shaz\Anaconda3\lib\site-packages\vispy\app\_default_app.py", line 47, in use_app

default_app = Application(backend_name)


 "C:\Users\shaz\Anaconda3\lib\site-packages\vispy\app\application.py", line 49, in __init__

self._use(backend_name)


 "C:\Users\shaz\Anaconda3\lib\site-packages\vispy\app\application.py", line 235, in _use

raise RuntimeError(msg)

RuntimeError: Could not import backend "SDL2":

Traceback (most recent call last):

 "/usr/bin/dockercloud-haproxy", line 9, in <module>
load_entry_point('dockercloud-haproxy==1.4', 'console_scripts', 'dockercloud-haproxy')()

 "/usr/lib/python2.7/site-packages/haproxy/main.py", line 49, in main
listen_docker_events()

 "/usr/lib/python2.7/site-packages/haproxy/eventhandler.py", line 67, in listen_docker_events
for event in docker.events(decode=True):

 "/usr/lib/python2.7/site-packages/docker/client.py", line 217, in _stream_helper
data = reader.read(1)

 "/usr/lib/python2.7/site-packages/requests/packages/urllib3/response.py", line 243, in read
data = self._fp.read(amt)

 "/usr/lib/python2.7/httplib.py", line 588, in read
return self._read_chunked(amt)

 "/usr/lib/python2.7/httplib.py", line 630, in _read_chunked
line = self.fp.readline(_MAXLINE + 1)

 "/usr/lib/python2.7/socket.py", line 480, in readline
data = self._sock.recv(self._rbufsize)

 "/usr/lib/python2.7/site-packages/gevent/_socket2.py", line 280, in recv
self._wait(self._read_event)

 "/usr/lib/python2.7/site-packages/gevent/_socket2.py", line 179, in _wait
self.hub.wait(watcher)

 "/usr/lib/python2.7/site-packages/gevent/hub.py", line 627, in wait
result = waiter.get()

 "/usr/lib/python2.7/site-packages/gevent/hub.py", line 875, in get
return self.hub.switch()

 "/usr/lib/python2.7/site-packages/gevent/hub.py", line 606, in switch
return greenlet.switch(self)gevent.hub.BlockingSwitchOutError: Impossible to call blocking function in the event loop callback