How to format condition

[mikesweden (Mike)]

I am using a condition to get some information about the weather and a forecast but recently it started showing an error.

This is what I’ve added to configuration.yaml a long time ago:
```

{{as_timestamp(strptime(state_attr(‘weather.smhi_home’,
‘forecast’)[2].datetime, ‘%Y-%m-%d %H:%M:%S’)) |
timestamp_custom("%a %-d") }}
<ha-icon
icon={{states(‘sensor.weather_smhi_icon2’)}}>

{{state_attr(‘weather.smhi_home’,
‘forecast’)[2].temperature}} /
{{state_attr(‘weather.smhi_home’,
‘forecast’)[2].templow}}

I did that some years ago and I think that what I want is the day (like Sat) and the day number of the month (like 29)

Here is the error message:

2022-04-29 13:08:45 WARNING (MainThread) [homeassistant.helpers.template] Template warning: 'strptime' got invalid input '2022-05-04T12:00:00' when rendering template '<center> {{as_timestamp(strptime(state_attr('weather.smhi_home', 'forecast')[5].datetime, '%Y-%m-%d %H:%M:%S')) | timestamp_custom("%a %-d") }}</BR> <ha-icon icon={{states('sensor.weather_smhi_icon5')}}></ha-icon></br> {{state_attr('weather.smhi_home', 'forecast')[5].temperature}} / {{state_attr('weather.smhi_home', 'forecast')[5].templow}}  </center>' but no default was specified. Currently 'strptime' will return '2022-05-04T12:00:00', however this template will fail to render in Home Assistant core 2022.1

[123 (Taras)]

The reason for the warning message is explained within the warning message itself. Your template is using the strptime() function without specifying a default value.

Template warning: ‘strptime’ got invalid input … no default was specified

This requirement (need to supply a default value) was implemented last fall. Here’s a useful post explaining it, which functions/filters are affected, and what you need to do to comply with it.

Updating Templates with the new default values in 2021.10.x

I keep seeing the same question about the new default argument for the templating. This post will cover all possible ways to define default. All the methods that were changed: acos as_timestamp asin atan atan2 cos float log round sin sqrt strptime tan timestamp_custom timestamp_local timestamp_utc Each of them have the exact same default functionality but a different number of arguments. There are multiple ways to use these functions, and this is where all the confusion lies. Understandi…

[mikesweden (Mike)]

Thank you @123 !

I am trying to understand this and added a zero (0) but now instead of days I always get returned 0.

                  <center>
                  {{as_timestamp(strptime(state_attr('weather.smhi_home',
                  'forecast')[1].datetime, '%Y-%m-%d %H:%M:%S', 0)) |
                  timestamp_custom("%a %-d") }}</BR> <ha-icon
                  icon={{states('sensor.weather_smhi_icon1')}}></ha-icon></br>
                  {{state_attr('weather.smhi_home',
                  'forecast')[1].temperature}} /
                  {{state_attr('weather.smhi_home',
                  'forecast')[1].templow}}  </center>

[123 (Taras)]

@mikesweden

always get returned 0

Confirm the data referenced by the state_attr() function is in the format that you have configured strptime() to convert.

[mikesweden (Mike)]

Now I get the right value returned again (I added “, 0” as a test at the end of the first line) but as I dont understand the coding I still get the same error message:
got invalid input
but no default was specified. Currently ‘strptime’ will return ‘2022-05-03T12:00:00’, however this template will fail to render in Home Assistant core 2022.1

                      {{as_timestamp(strptime(state_attr('weather.smhi_home',
                      'forecast')[1].datetime, '%Y-%m-%d %H:%M:%S'), 0) |
                      timestamp_custom("%a %-d") }}</BR> <ha-icon
                      icon={{states('sensor.weather_smhi_icon1')}}></ha-icon></br>
                      {{state_attr('weather.smhi_home',
                      'forecast')[1].temperature}} /
                      {{state_attr('weather.smhi_home',
                      'forecast')[1].templow}}  </center>

[mikesweden (Mike)]

Is there some easier way to do this or am I just missing some formatting in that code? I’ve understood that I need a default value but I haven’t figured out a working way for it.