Quick jinja2 question, ignore "0" when doing an average

Configuration
1

I am using an average sensor to get the average current temperature of a floor.

Sometimes when I reboot HA (such as after an update), my sensors report “0” as a current temperate for a moment. I’d like to ignore their value in my average when they report 0 and only use it when they don’t.

I tried using an if statement, but it gets convoluted and I’m not certain this is the most clean or efficient way, as I think I’d need to go in a for loop to go through all of them and stick their value in a temporary variable of some kind?

{% if state_attr('climate.thermostat_chambre_des_maitres', 'current_temperature'), 0 -%} 
In this case ignore it
{%- else -%}
In this car use it
{{ state_attr('climate.thermostat_chambre_des_maitres', 'current_temperature')}}
{%- endif %}

Surely there’s a smarter way to go about this?

2

Post your actual template…

You can use reject() or rejectattr() filters to remove values, but the specific way to use them will depend on your template.

3

Here’s what I have so far:

{% set templist = [state_attr('climate.thermostat_chambre_des_maitres', 'current_temperature'),(state_attr('climate.thermostat_salle_de_bain', 'current_temperature')),(state_attr('climate.thermostat_chambre_megane', 'current_temperature')),(state_attr('climate.thermostat_cuisine', 'current_temperature'))] %}

{% for i in templist %}
     {{i}}
{% endfor %}

This returns all 4 current temperatures as 0. I’d like to add them up, and divide by the number of non-zero items in the list.

This is where I’m somewhat stumped. I’m not sure I’m going about it the right way.

4 
{% set clim_list = ['climate.thermostat_chambre_des_maitres', 'climate.thermostat_salle_de_bain',
'climate.thermostat_chambre_megane', 'climate.thermostat_cuisine'] %}
{{ expand(clim_list | select('has_value')) | map(attribute= 'attributes.current_temperature') 
| reject('eq', 0) | average(0) }}
5

You may be onto something, but right now this errors out as all 4 sensors are reading 0 at the moment:

ValueError: Template error: average got invalid input '(<generator object select_or_reject at 0x7f786faf80>,)' when rendering template '{% set clim_list = ['climate.thermostat_chambre_des_maitres', 'climate.thermostat_salle_de_bain',
'climate.thermostat_chambre_megane', 'climate.thermostat_cuisine'] %}
{{ expand(clim_list | select('has_value')) | map(attribute= 'attributes.current_temperature') 
| reject('eq', 0) | average }}' but no default was specified
6

Add a default to average. I have fixed it above.