![]() ![]() Timedelta returns a timedelta object and accepts the same arguments as the Python datetime.timedelta function – days, seconds, microseconds, milliseconds, minutes, hours, weeks. Using relative_time() will cause templates to be refreshed at the start of every new minute.Note that it only works for dates in the past. The age can be in second, minute, hour, day, month or year (but only the biggest unit is considered, e.g., if it’s 2 days and 3 hours, “2 days” will be returned). Relative_time converts datetime object to its human-friendly “age” string. If that fails, it returns the default value or, if omitted, raises an error. ![]() Strptime(string, format, default) parses a string based on a format and returns a datetime object. This function can also be used as a filter. This function can also be used as a filter.Īs_local() converts datetime object to local time. If that fails, returns the default value, or if omitted raises an error. Using today_at() will cause templates to be refreshed at the start of every new minute.Īs_datetime() converts a string containing a timestamp, or valid UNIX timestamp, to a datetime object.Īs_timestamp(value, default) converts datetime object or string to UNIX timestamp.Today_at(value) converts a string containing a military time format to a datetime object with today’s date in your time zone. Using utcnow() will cause templates to be refreshed at the start of every new minute.For specific values: utcnow().second, utcnow().minute, utcnow().hour, utcnow().day, utcnow().month, utcnow().year, utcnow().weekday() and utcnow().isoweekday().Utcnow() returns a datetime object of the current time in the UTC timezone. Using now() will cause templates to be refreshed at the start of every new minute.You can also use: now().second, now().minute, now().hour, now().day, now().month, now().year, now().weekday() and now().isoweekday() and other datetime attributes and functions.Now() returns a datetime object that represents the current time in your time zone. Now(), relative_time(), today_at(), and utcnow() are not supported in limited templates. This form of the expression short-circuits so if the platform is event the expression trigger.to_state.state will never be evaluated and won’t cause an error. Instead you have to do this if atform = 'event' else trigger.to_state.state. ![]() This won’t work because both expressions will be evaluated and one will fail since the field doesn’t exist. This means you cannot use this filter to prevent executing an expression which would result in an error.įor example, if you wanted to select a field from trigger in an automation based on the platform you might go to make this template: atform = 'event' | iif(, trigger.to_state.state). The if_true, if_false and if_none expressions will all be evaluated and the filter will simply return one of the resulting values. The immediate if filter does not short-circuit like you might expect with a typical conditional statement. The following example results in the number 20.001: The examples below show the output of a temperature sensor with state 20.001, unit ☌ and user configured presentation rounding set to 1 decimal. Script : msg_who_is_home : sequence : - service : notify.notify data : message : > To keep a clear overview, consider using YAML multiline strings to define your templates: Navigate to Developer Tools > Template, create your template in the Template editor and check the results on the right. The frontend has a template editor tool to help develop and debug templates. We will not go over the basics of the syntax, as Jinja2 does a great job of this in their templates documentation. Jinja2 supports a wide variety of operations: This means that we are using their syntax and make some custom Home Assistant variables available to templates during rendering. Templating in Home Assistant is powered by the Jinja2 templating engine. Process incoming data from sources that provide raw data, like MQTT, rest sensor or the command_line sensor. ![]()
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