Thanks Tom! I've put suggestion 1 and 2 in place.
About 3, yeah, you are right. Picking up and using some working code doesnt
mean it should remain called AddElectricity. CalcDrought should be more in
place.
Again, thank you both!
Op woensdag 27 mei 2020 22:27:33 UTC+2 schreef Tom Keffer:
>
> 1. The ordering of your services is still not quite right. The group
> "data_services" is run before "process_services." You want
>
> data_services = ,
> process_services = weewx.engine.StdConvert, weewx.engine.StdCalibrate,
> weewx.engine.StdQC,
> weewx.wxservices.StdWXCalculate, user.electricity.AddElectricity
>
> 2. In the interest of realism, the simulator occasionally emits a None
> value for a datum. This is what is causing your ET to be None. You need to
> get in the habit of checking for None. Something like:
>
> ET = event.record.get('ET')
> if ET is not None:
> event.record['neerslagtekort'] = ...
>
> 3. Incidentally, you really should change the names to something more
> meaningful than "electricity.py" and "AddElectricity".
>
> -tk
>
> On Wed, May 27, 2020 at 1:20 PM Maarten van der Hoeven <hoev...@gmail.com
> <javascript:>> wrote:
>
>> Hmmm, maybe adding ET to Simulator is not such a bad idea... Just adding
>> the ET-observation to this code:
>>
>> self.observations = {
>> 'outTemp' : Observation(magnitude=20.0, average= 50.0,
>> period=24.0, phase_lag=14.0, start=start_ts),
>> 'inTemp' : Observation(magnitude=5.0, average= 68.0,
>> period=24.0, phase_lag=12.0, start=start_ts),
>> 'barometer' : Observation(magnitude=1.0, average= 30.1,
>> period=48.0, phase_lag= 0.0, start=start_ts),
>> 'pressure' : Observation(magnitude=1.0, average= 30.1,
>> period=48.0, phase_lag= 0.0, start=start_ts),
>> 'windSpeed' : Observation(magnitude=5.0, average= 5.0,
>> period=48.0, phase_lag=24.0, start=start_ts),
>> 'windDir' : Observation(magnitude=180.0, average=180.0,
>> period=48.0, phase_lag= 0.0, start=start_ts),
>> 'windGust' : Observation(magnitude=6.0, average= 6.0,
>> period=48.0, phase_lag=24.0, start=start_ts),
>> 'windGustDir': Observation(magnitude=180.0, average=180.0,
>> period=48.0, phase_lag= 0.0, start=start_ts),
>> 'outHumidity': Observation(magnitude=30.0, average= 50.0,
>> period=48.0, phase_lag= 0.0, start=start_ts),
>> 'inHumidity' : Observation(magnitude=10.0, average= 20.0,
>> period=24.0, phase_lag= 0.0, start=start_ts),
>> 'radiation' : Solar(magnitude=1000, solar_start=6,
>> solar_length=12),
>> 'UV' : Solar(magnitude=14, solar_start=6,
>> solar_length=12),
>> 'rain' : Rain(rain_start=0, rain_length=3,
>> total_rain=0.2, loop_interval=self.loop_interval),
>> 'txBatteryStatus': BatteryStatus(),
>> 'windBatteryStatus': BatteryStatus(),
>> 'rainBatteryStatus': BatteryStatus(),
>> 'outTempBatteryStatus': BatteryStatus(),
>> 'inTempBatteryStatus': BatteryStatus(),
>> 'consBatteryVoltage': BatteryVoltage(),
>>
>>
>> Op dinsdag 26 mei 2020 23:38:26 UTC+2 schreef Maarten van der Hoeven:
>>>
>>> Hi group,
>>>
>>> Having programming experience, but new to python. Want to write some
>>> piece of code, that calculates the amount of precipitation shortage (rain
>>> minus evaotranspiration). It's a measure of drought.
>>>
>>> Using some example coding, and extended those.
>>>
>>>
>>> See the piece of code below. event.record['barometer'] and
>>> event.record['outTemp'] is working (used as an example, no drought-relation
>>> ship); they give real values.
>>>
>>> However, event.record['ET'] gives me a KeyError. I dont understand it.
>>> It is in my wview_extended schema (which I extended), its also populated in
>>> my database.
>>>
>>> Why the KeyError?
>>>
>>>
>>> import schemas.wview_extended
>>> schema = {
>>> 'table': schemas.wview_extended.table + [('neerslagtekort', 'REAL')],
>>> 'day_summaries' : schemas.wview_extended.day_summaries +
>>> [('neerslagtekort', 'SCALAR')]
>>> }
>>>
>>> import weewx.units
>>> weewx.units.obs_group_dict['neerslagtekort'] = 'group_rain'
>>>
>>>
>>> neerslag = 0
>>> verdamping = 0
>>> neerslagtekort = 0
>>>
>>> class AddElectricity(StdService):
>>>
>>> def __init__(self, engine, config_dict):
>>>
>>> # Initialize my superclass first:
>>> super(AddElectricity, self).__init__(engine, config_dict)
>>>
>>> # Bind to any new archive record events:
>>> self.bind(weewx.NEW_ARCHIVE_RECORD, self.new_archive_record)
>>>
>>> self.last_total = None
>>>
>>> def new_archive_record(self, event):
>>>
>>>
>>> barometer = event.record['barometer']
>>> outTemp = event.record['outTemp']
>>> ET = event.record['ET']
>>> shortage = precipitation - evaporation
>>>
>>> if self.last_total:
>>> event.record['neerslagtekort'] = shortage
>>>
>>> self.last_total = shortage
>>> print("**** NEERSLAGTEKORT **** ")
>>> print(shortage)
>>>
>>>
>>>
>>> Traceback (most recent call last):
>>> File "/usr/share/weewx/weewxd", line 261, in <module>
>>> main()
>>> File "/usr/share/weewx/weewxd", line 154, in main
>>> engine.run()
>>> File "/usr/share/weewx/weewx/engine.py", line 202, in run
>>> self.dispatchEvent(weewx.Event(weewx.POST_LOOP))
>>> File "/usr/share/weewx/weewx/engine.py", line 224, in dispatchEvent
>>> callback(event)
>>> File "/usr/share/weewx/weewx/engine.py", line 596, in post_loop
>>> self._software_catchup()
>>> File "/usr/share/weewx/weewx/engine.py", line 656, in _software_catchup
>>> self.engine.dispatchEvent(weewx.Event(weewx.NEW_ARCHIVE_RECORD,
>>> File "/usr/share/weewx/weewx/engine.py", line 224, in dispatchEvent
>>> callback(event)
>>> File "/usr/share/weewx/user/electricity.py", line 64, in
>>> new_archive_record
>>> ET = event.record['ET']
>>> KeyError: 'ET'
>>>
>>>
>>> mysql> select from_unixtime(datetime), neerslagtekort,ET,rain from
>>> archive order by datetime desc limit 5;
>>>
>>> +-------------------------+---------------------+--------------------------+------+
>>> | from_unixtime(datetime) | neerslagtekort | ET
>>> | rain |
>>>
>>> +-------------------------+---------------------+--------------------------+------+
>>> | 2020-05-26 23:26:00 | -1.5559202862588535 |
>>> 0.000005153290200925555 | 0 |
>>> | 2020-05-26 23:25:00 | NULL |
>>> 0.000005156477243511403 | 0 |
>>> | 2020-05-26 23:24:00 | 20 |
>>> 0.000005159745765396156 | 0 |
>>> | 2020-05-26 23:23:00 | 20 |
>>> 0.0000051629007161015734 | 0 |
>>> | 2020-05-26 23:22:00 | NULL |
>>> 0.000005165840624070325 | 0 |
>>>
>>> +-------------------------+---------------------+--------------------------+------+
>>> 5 rows in set (0.00 sec)
>>>
>>>
>>> --
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