Core: emulated_hue errors thrown on dev branch

[hoopty]

Home Assistant release (hass --version):
0.29.0.dev0

Python release (python3 --version):
3.4.5

Component/platform:
emulated_hue

Description of problem:
Exception thrown, traceback below

Expected:
No errors.

Problem-relevant configuration.yaml entries and steps to reproduce:

emulated_hue:

1. Start HA
2. 
   
   
   3.
   

Traceback (if applicable):

16-09-20 13:42:19 homeassistant.core: BusHandler:Exception doing job
Traceback (most recent call last):
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/core.py", line 1162, in job_handler
    func(*args)
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/core.py", line 469, in onetime_listener
    listener(event)
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/components/http.py", line 129, in start_wsgi_server
    server.start()
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/components/http.py", line 346, in start
    from cherrypy import wsgiserver
  File "/usr/local/etc/home-assistant/deps/cherrypy/__init__.py", line 67, in <module>
    from cherrypy import _cpdispatch as dispatch  # noqa
ImportError: cannot import name '_cpdispatch'
16-09-20 13:42:19 homeassistant.core: BusHandler:Exception doing job
Traceback (most recent call last):
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/core.py", line 1162, in job_handler
    func(*args)
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/core.py", line 469, in onetime_listener
    listener(event)
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/components/emulated_hue.py", line 90, in start_emulated_hue_bridge
    server.start()
  File "/usr/local/home-assistant-dev/lib/python3.4/site-packages/homeassistant/components/http.py", line 346, in start
    from cherrypy import wsgiserver
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2229, in _find_and_load_unlocked
KeyError: 'cherrypy'

Additional info:

[robbiet480]

I also have this issue from time to time.

[hoopty]

I'm still getting this error with 0.31.1, and so far it's happening every time I start, not just occasionally.

[sidren]

Im also getting this, which seems to be preventing HA from starting. Sometimes will be resolved with a reboot, sometimes not. I'm on 0.31.1

[fronzbot]

Same issue, running 0.31.1. I have had a decent amount of success by tricking HA into working by restarting with the emulated_hue portion commented out in the config file. Once HA is running, I uncomment the emulated_hue lines and then call the restart service from dev tools on the webpage and can (almost) always get HA to start fine and get the emulated_hue working properly.

[hoopty]

I'm not seeing this any more.... If anyone else is still seeing this speak up & we can reopen.