python syntax: should be = not == in the ‘else’s

semantics: presumably testing as they make no sense
⊣GE⊢

> On 16 Jan 2025, at 8:00 pm, 'Rory Gillies' via weewx-user 
> <[email protected]> wrote:
> 
> Thanks Michael,
> 
> Based on the values being calculated in order (as it says in the docs) I 
> tried the following which didn't work (although no errors when starting 
> WeeWX):
> 
> [StdCalibrate]
>   [[Corrections]]
>     windSpeed = 20 if windSpeed == 0 else windSpeed == windSpeed * 1.15
>     windGust = windSpeed + 10 if windGust == 0 else windGust == windGust * 
> 1.15
>     windDir = windDir if windDir is not None else windDir == 220
> 
> So I reversed it based on windDir being null which didn't work either:
> 
> windSpeed = windSpeed * 1.15 if winDir is not None else windSpeed == 20
> windGust = windGust * 1.15 if windDir is not None else windGust == windSpeed 
> + 10
> windDir = windDir if windDir is not None else windDir == 220
> 
> This is the overnight plot, you can see it went off completely for a couple 
> of hours after 04:00. I was working on it around between 22:00 and 00:00 when 
> it started to drop.
> 
> <Screenshot 2025-01-16 at 08.51.41.png>
> Also, I noticed a strange effect with the force_null setting, if I set it to 
> True windDir appears to stay at the last known direction, if I set it as 
> False windDir moves to north, I thought this was supposed to work the other 
> way round?
> 
> Thanks,
> 
> Rory
> On Wednesday, January 15, 2025 at 6:09:54 PM UTC [email protected] wrote:
>> 
>> For your specific case I'd just kick zero wind loop packets out:
>> 
>> windSpeed = None if windSpeed == 0 else windSpeed, loop
>> 
>> The windDir should be "None" if windSpeed is zero anyway, but to be sure:
>> 
>> windDir = None if windSpeed == 0 else windDir, loop
>> 
>> 
>> [email protected] <> schrieb am Mittwoch, 15. Januar 2025 um 18:48:53 
>> UTC+1:
>>> See: 
>>> https://weewx.com/docs/5.1/reference/weewx-options/stdcalibrate/?h=stdcalibrate#corrections
>>> 
>>> [email protected] <> schrieb am Mittwoch, 15. Januar 2025 um 18:47:38 
>>> UTC+1:
>>>> Yes it is. I have a station with two Anemometers and I mix them in the 
>>>> way, that always the higher windSpeed/windGust will be used, if both are 
>>>> there, or the one that's there. Anemometers freeze or sometime I have 
>>>> Signal strength issues. I always take the direction of a specific one (an 
>>>> ultrasonic with heating, that won't freeze), except it isn't there. It's 
>>>> quite a brainf*ck, but it works. Some other Corrections are also done:
>>>> 
>>>> [StdCalibrate]
>>>>     
>>>>     [[Corrections]]
>>>>         
>>>>         radiation = luminosity/126.7 if luminosity is not None else None   
>>>>  #gw1000 fix
>>>>         lightning_distance = lightning_distance if lightning_strike_count 
>>>> > 0 else None
>>>>         windSpeed = ws90_windSpeed if 'windSpeed' not in locals() else 
>>>> windSpeed if 'ws90_windSpeed' not in locals() else ws90_windSpeed if 
>>>> ws90_windSpeed > windSpeed else windSpeed
>>>>         windGust = ws90_windGust if 'windGust' not in locals() else 
>>>> windGust if 'ws90_windGust' not in locals() else ws90_windGust if 
>>>> ws90_windGust > windGust else windGust
>>>>         windDir = ws90_windDir if 'ws90_windDir' in locals() and 
>>>> ws90_windDir is not None else windDir
>>>> 
>>>> 
>>>> 
>>>> Rory Gillies schrieb am Mittwoch, 15. Januar 2025 um 17:53:42 UTC+1:
>>>>> I know I could just try this but interested to hear if it would work, or 
>>>>> if I have any other options. WeeWX 5.1.
>>>>> 
>>>>> Is it possible to use logic in StdCalibrate in weewx.con? Something like 
>>>>> this:
>>>>> 
>>>>> [StdCalibrate]
>>>>>     if windSpeed == 0 windspeed = windspeed + 15
>>>>>     if windDir == NULL windDir = windDir + 235
>>>>> 
>>>>> The reason is I have a dying anemometer and it's going to take a couple 
>>>>> of weeks to get a replacement installed (it's on my chimney 8m above the 
>>>>> ground). When the wind blows from SSW to WSW above 20mph it sometimes 
>>>>> drops to zero every few loop packets (other times it is perfect).
>>>>> 
>>>>> 
>>>>> 
>>>>> I know the observations will be technically incorrect but better than no 
>>>>> wind at all!
>>>>> 
> 
> 
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> <Screenshot 2025-01-16 at 08.51.41.png>

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