i forgot to ask: start_ts is outside my __init__’s scope, so should i use
self.the_time? e.g.
import weewx.drivers.simulator as simulator
...
# VP2 optional observations
self.observations['extraTemp1'] = simulator.Observation(
magnitude=4.0, average=50.0, period=18.0, phase_lag=12.0,
start=self.the_time)
> On 12 Aug 2020, at 2:56 am, Graham Eddy <[email protected]> wrote:
>
> close to working. but in my __init__, when i alter self.observations after
> calling super(..), it is after the ‘observations’ filter from weewx.conf has
> been applied. so, after carefully disabling some of my new value types by
> excluding them from ‘observations’ filter (Simulator.__init__ dutifully
> deletes unwanted value types if they are present at that time), my __init__
> just adds them to self.observations afterwards. i don’t want to have to
> re-apply the ‘observations’ filter in my __init__!
>
> and now it is 3am, i am off…
> cheers
>
>> On 12 Aug 2020, at 1:08 am, Tom Keffer <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Try this version
>> <https://raw.githubusercontent.com/weewx/weewx/master/bin/weewx/drivers/simulator.py>
>> of the simulator. It should be a little easier to subclass.
>>
>> On Tue, Aug 11, 2020 at 7:35 AM Tom Keffer <[email protected]
>> <mailto:[email protected]>> wrote:
>> Why not just subclass class Simulator? In the __init__ function of your new
>> class, call the superclass's initializer, then add additional types to
>> self.observations.
>>
>> You would also have to provide your own loader() function, which would
>> largely replicate the logic in the existing loader().
>>
>> But, I take your point: class Simulator could be structured to make it
>> easier to subclass and provide specialized simulators.
>>
>> -tk
>>
>>
>> On Tue, Aug 11, 2020 at 6:43 AM Graham Eddy <[email protected]
>> <mailto:[email protected]>> wrote:
>> enhancement request to be able to add new value generators to
>> weewx.drivers.Simulator from user.extensions (rather than edit a private
>> copy)
>>
>> easiest way i see is to just move self.observations to class attribute and
>> let folk extend the list. this would be facilitated by an abstract class for
>> Observation, Rain, Solar, BatteryStatus, BatteryVoltage, SignalStrength of
>> form
>> class AbstractObservation(object):
>> def value_at(self, time_ts):
>> raise NotImplementedError
>> for developers to subclass their own value generators. mind you, the
>> existing ones are pretty flexible - i used BatteryStatus as stimulus for
>> lightning_strike_count.
>> otherwise, to avoid class attribute, could add method like
>> add_observation_type(obs_type, value_generator)
>>
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