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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