Numeric comparison of string (like an entity state)

[TheFes]

Describe the enhancement

The problem I have with the current implementation of HA is that all states are strings, and that makes numeric comparison difficult. Imagine I want to get the names of all battery entities with a value between 10 and 50, I'd need to use a for loop with namespace, or use zip, like this:

{% set threshold_min = 10 %} 
{% set threshold_max = 50 %}
{% set battery_devices = states.sensor 
    | selectattr('attributes.device_class', 'eq', 'battery')
    | selectattr('state', 'is_number')
    | map(attribute='entity_id')
    | list  %}
{% set battery_states = battery_devices
  | map('states')
  | map('float')
  | list %}
{% set low_battery_devices = zip(battery_devices, battery_states) 
  | selectattr('1', '<', threshold_max)
  | selectattr('1', '>', threshold_min)
  | map(attribute='0')
  | map('state_attr', 'friendly_name')
  | list %}

Like suggested on GitHub it would be great if is_number could be extended so it would have two additional parameters, one for a test, and one for a value to compare it with. In case the value which is tested isn't numeric (like unavailable it could just return false)

Example usage

{% set threshold_min = 10 %} 
{% set threshold_max = 50 %}
{% set low_battery_devices = states.sensor 
    | selectattr('attributes.device_class', 'eq', 'battery')
    | selectattr('state', 'is_number', '<', threshold_max)
    | selectattr('state', 'is_number', '>', threshold_min)
    | map(attribute='name')
    | list  %}

Current workarounds

Either using zip like shown above of using a for-loop and a namespace

Anything else?

No response

[Petro31]

yes please