core: ImportError: cannot import name 'Zeroconf'

hello there… first time instal and after several attempts im still sticking at

The following components and platforms could not be set up:
ignore
discovery
zeroconf
Please check your config.

config appears fine both via interface check and thru ssh.

after searching I have tried both updating discovery and zeroconf and also downgrading to zeroconf 2.0

log files are

2018-11-12 15:43:58 WARNING (MainThread) [homeassistant.setup] Setup of recorder is taking over 10 seconds.
2018-11-12 15:43:58 WARNING (MainThread) [homeassistant.setup] Setup of frontend is taking over 10 seconds.
2018-11-12 15:43:59 ERROR (MainThread) [homeassistant.setup] Error during setup of component discovery
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/setup.py", line 145, in _async_setup_component
    hass, processed_config)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/discovery.py", line 114, in async_setup
    from netdisco.discovery import NetworkDiscovery
ImportError: cannot import name 'NetworkDiscovery'
2018-11-12 15:44:01 ERROR (MainThread) [homeassistant.loader] Unable to find component ignore
2018-11-12 15:44:01 ERROR (MainThread) [homeassistant.setup] Setup failed for ignore: Component not found.
2018-11-12 15:44:03 ERROR (MainThread) [homeassistant.setup] Error during setup of component zeroconf
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/setup.py", line 148, in _async_setup_component
    component.setup, hass, processed_config)  # type: ignore
  File "/usr/lib/python3.5/asyncio/futures.py", line 380, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.5/asyncio/tasks.py", line 304, in _wakeup
    future.result()
  File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
    raise self._exception
  File "/usr/lib/python3.5/concurrent/futures/thread.py", line 55, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/zeroconf.py", line 32, in setup
    from zeroconf import Zeroconf, ServiceInfo
ImportError: cannot import name 'Zeroconf'

running on PiZero

thanks very