Guard existence of groups in Python script

please help me out. I have a Python script that checks for unavailable entities. I that, I declare a

exclude_conditional_groups = []

and after that, fill it:

if hass.states.get('binary_sensor.dark_outside').state == 'off':
    exclude_conditional_groups = ['group.philips_room_motion_sensor_switches','group.philips_buiten_motion_sensor_switches']

or not ofc…

next, there’s a

exclude_groups = ['group.entity_blacklist' ,'group.switches_total_device_power',
                   'group.switches_total_device_energy','group.lights_inside_total_device_power',
                   'group.lights_inside_total_device_energy','group.lights_outside_total_device_power',
                   'group.lights_outside_total_device_energy']

and finally I concatenate these 2 with:

groups_excludes = exclude_groups + exclude_conditional_groups

to do:

# add groups entities to exclude_entities list
for group in groups_excludes:
    if group is not None:
        for entity_id in hass.states.get(group).attributes['entity_id']:
            excludes.append(entity_id)

this works perfectly fine and the entity_id’s get appended alright. However, because one of my integrations currently is in conflict with HA, the groups in the exclude_groups are not created. this returns an error in the logs for that line

Error executing script: 'NoneType' object is not subscriptable
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/python_script/__init__.py", line 224, in execute
    exec(compiled.code, restricted_globals)
  File "uun.py", line 75, in <module>
  File "/usr/local/lib/python3.9/site-packages/RestrictedPython/Eval.py", line 35, in default_guarded_getitem
    return ob[index]
TypeError: 'NoneType' object is not subscriptable

I would have thought the

for group in groups_excludes: # exclude_groups
    if group is not None:

would take care of that check, but apparently not.

What should I do to guard that better?

thanks for having a look!

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