Is it possible to reset manually added attributes of an entity, including headers?

Configuration
1

Is it possible to reset manually added attributes of an entity, including headers? Or alternatively, return the entity to the initial conditions, when the attributes had not yet been added?

2

What is a “header”?

Can you give an example of what you are trying to do?

3

I would like to transform this attributes state:

last_triggered: ‘2021-10-26T16:34:00.591184+00:00’
mode: single
current: 0
id: sensor rain
friendly_name: sensor rain
icon: ‘mdi:water’

in this:

id: sensor rain
friendly_name: sensor rain
icon: ‘mdi:water’

4

Why do you want to delete the first three attributes?

5

it would take a long time to explain :slightly_smiling_face:

6

Then the short answer is “no”.

7

solved!!
I enabled pyton scripts by adding the line ‘python_script:’ inside the configuration.yaml file.
Then I created the ‘python_scripts’ folder inside the ‘config’ folder.
Inside the ‘pyton scrips’ folder I have pasted these two files:

‘services.yaml’

# set_state.py
set_state:
  description: Imposta lo stato e/o gli attributi di una entitĂ  ai valori desiderati
  fields:
    entity_id:
      description: Nome completo dell'entitĂ  da aggiornare
      example: device_tracker.mio_tracker
    state:
      description: Nuovo valore dello stato dell'entitĂ  (opzionale)
      example: not_home
    other:
      description: Qualunque altro valore verrĂ  impostato negli attributi dell'entitĂ 

and 'set_state.py'

#--------------------------------------------------------------------------------------------------
# Set the state or other attributes for the entity specified in the Automation Action
#--------------------------------------------------------------------------------------------------

inputEntity = data.get('entity_id')
if inputEntity is None:
    logger.warning("===== entity_id is required if you want to set something.")
elif hass.states.get(inputEntity) is None:
    logger.warning("===== unknown entity_id: %s", inputEntity)
else:
    inputStateObject = hass.states.get(inputEntity)
    inputState = inputStateObject.state
    inputAttributesObject = inputStateObject.attributes.copy()

    for item in data:
        newAttribute = data.get(item)
        logger.debug("===== item = {0}; value = {1}".format(item,newAttribute))
        if item == 'entity_id':
            continue            # already handled
        elif item == 'state':
            inputState = newAttribute
        else:
            inputAttributesObject[item] = newAttribute
        
    hass.states.set(inputEntity, inputState, inputAttributesObject)

I created a sensor2 template with the same status as sensor1 and with only the attribute that interests me not to delete, always the same as that of sensor1

- platform: template
  sensors:
    sensor2:
      value_template: {{ states('sensor.sensor1')}}
      attribute_templates:
        attributename2: {{state_attr('sensor.sensor1', 'attributename2')}}

Then I created an ‘input_boolean.sensor2’ and these 2 automations, the first to update sensor2 to the new attributes and the second to reset it to the initial values.

- id: 'sensor2 update'
  alias: sensor2 update
  trigger:
  - entity_id: input_boolean.sensor2
    platform: state
    to: 'on'
  action:
  - service: python_script.set_state
    data_template:
      entity_id: sensor.sensor2
      attributename1: {{state_attr('sensor.sensor1', 'attributename1')}}
      attributename2: {{state_attr('sensor.sensor1', 'attributename2')}}
      attributename3: {{state_attr('sensor.sensor1', 'attributename3')}}

- id: 'sensor2 reset'
  alias: sensor2 reset
  trigger:
  - entity_id: input_boolean.sensor2
    platform: state
    to: 'off'
  action:
  - service: homeassistant.update_entity
    data: sensor.sensor2
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