LG webOS Smart TV component doesn't work: pylgtv package missing

[Vinz87]

Home Assistant release with the issue:

0.77.3

Last working Home Assistant release (if known):

Operating environment (Hass.io/Docker/Windows/etc.):

Raspberry Pi Zero W, virtual environment install

Component/platform:

https://www.home-assistant.io/components/media_player.webostv/

Description of problem:
the platform webostv doesn't start because it misses the pylgtv package

Sep 29 09:47:36 raspberrypi hass[11226]: 2018-09-29 09:47:36 ERROR (Thread-5) [homeassistant.util.package] Unable to install package pylgtv==0.1.7: Exception:
Sep 29 09:47:36 raspberrypi hass[11226]: Traceback (most recent call last):
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/usr/lib/python3.5/shutil.py", line 544, in move
Sep 29 09:47:36 raspberrypi hass[11226]:     os.rename(src, real_dst)
Sep 29 09:47:36 raspberrypi hass[11226]: PermissionError: [Errno 13] Permission denied: '/srv/homeassistant/lib/python3.5/site-packages/pylgtv-0.1.9.dist-info/INSTALLER' -> '/tmp/pip-9lrsjmlf-uninstall/srv/homeassistant/lib/python3.5/site-packages/pylgtv-0.1.9.dist-info/INSTALLER'
Sep 29 09:47:36 raspberrypi hass[11226]: During handling of the above exception, another exception occurred:
Sep 29 09:47:36 raspberrypi hass[11226]: Traceback (most recent call last):
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/basecommand.py", line 215, in main
Sep 29 09:47:36 raspberrypi hass[11226]:     status = self.run(options, args)
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/commands/install.py", line 360, in run
Sep 29 09:47:36 raspberrypi hass[11226]:     prefix=options.prefix_path,
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_set.py", line 778, in install
Sep 29 09:47:36 raspberrypi hass[11226]:     requirement.uninstall(auto_confirm=True)
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_install.py", line 754, in uninstall
Sep 29 09:47:36 raspberrypi hass[11226]:     paths_to_remove.remove(auto_confirm)
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_uninstall.py", line 115, in remove
Sep 29 09:47:36 raspberrypi hass[11226]:     renames(path, new_path)
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/srv/homeassistant/lib/python3.5/site-packages/pip/utils/__init__.py", line 267, in renames
Sep 29 09:47:36 raspberrypi hass[11226]:     shutil.move(old, new)
Sep 29 09:47:36 raspberrypi hass[11226]:   File "/usr/lib/python3.5/shutil.py", line 559, in move
Sep 29 09:47:36 raspberrypi hass[11226]:     os.unlink(src)
Sep 29 09:47:36 raspberrypi hass[11226]: PermissionError: [Errno 13] Permission denied: '/srv/homeassistant/lib/python3.5/site-packages/pylgtv-0.1.9.dist-info/INSTALLER'
Sep 29 09:47:36 raspberrypi hass[11226]: 2018-09-29 09:47:36 ERROR (MainThread) [homeassistant.requirements] Not initializing notify.webostv because could not install requirement pylgtv==0.1.7
Sep 29 09:47:36 raspberrypi hass[11226]: 2018-09-29 09:47:36 ERROR (MainThread) [homeassistant.setup] Unable to prepare setup for platform notify.webostv: Could not install all requirements.

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

notify:
  - platform: webostv
    host: 192.168.1.46
    name: livingroom_tv

Traceback (if applicable):

Additional information:
I tried to install the pylgtv package (as I had to do with the RPi.GPIO package for a similar problem) with following commands:

sudo su -s /bin/bash homeassistant
source /srv/homeassistant/bin/activate
pip3 install pylgtv

and also

pip install pylgtv

and I get these results:

Requirement already satisfied: pylgtv in /srv/homeassistant/lib/python3.5/site-packages
Requirement already satisfied: websockets in /srv/homeassistant/lib/python3.5/site-packages (from pylgtv)
Requirement already satisfied: asyncio in /srv/homeassistant/lib/python3.5/site-packages (from pylgtv)

after a reboot the problem persists.

[timmo001]

Try uninstalling pylgtv from everywhere possible, including with sudo. python3.5 seems to be the culprit.

python3.5 -m pip uninstall pylgtv

It looks to me like the package is installed or trying to be updated, but pip does not have access.

Also, you don't have to install the package manually as home assistant does this for you if I recall correctly

[Vinz87]

I solved in this way:

source /srv/homeassistant/bin/activate
pip3 uninstall pylgtv
pip3 install https://files.pythonhosted.org/packages/82/87/11c9028609388f3197233872c3b61b97dc8aa62de49c5131d47bb00716f2/pylgtv-0.1.7.tar.gz

So, the problem is that Home Assistant automatically install pylgtv 0.1.9, while the webostv component requires pylgtv 0.1.7.

I think this should be taken into account as a bug.