This one seems way better:
[StdCalibrate]
[[Corrections]]
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
[email protected] schrieb am Samstag, 9. März 2024 um 08:37:01 UTC+1:
> Anyway, thank you for helping me with this one!
>
> For the record:
>
> I have two pieces of hardware, one is using a classic anemometer with
> cups, the other one is an ultrasonic device. With very low wind speeds, the
> classic one shows zero wind, while the ultrasonic one shows low, but very
> plausible values. The ultrasonic one also doesn't freeze or gets blocked by
> snow, because is has a heating. On the other hand, the ultrasonic device
> often misses wind gusts and lacks accuracy in wet conditions.
> In short, the closes approach to represent reality is: always use the
> values from the sensor, which is showing the higher reading.
> Also, the Wind direction of the ultrasonic device has a better resolution
> and no vane that sometimes doesn't move, even in wind speeds, the classic
> anemometer is rotating.
> So the second thing is: always use windDir from the ultrasonic device.
>
> Both readings arrive in the same loop packet, their names are "windSpeed"
> and "ws90_windSpeed" (the latter ultrasonic), together with their gust
> speed and direction, except for situations, the sensor's data cannot be
> received by the console. So my first approach
>
> [StdCalibrate]
> [[Corrections]]
> windSpeed = ws90_windSpeed if ws90 if ws90_windSpeed > windSpeed
> else windSpeed
> windGust = ws90_windGust if ws90_windGust > windGust else windGust
> windDir = ws90_windDir if ws90_windDir is not None else windDir
>
> is working, but only in cases, both of the readings are present.
>
> Yesterday, windSpeed (from the classic device) was missing, where
> ws90_windSpeed was there. The result was, no windSpeed was recorded as at
> all, due to a python NameError, which was silently ignored.
>
> try:
> event.record[obs_type] = eval(self.corrections[obs_type], {'math': math},
> event.record)
> except (TypeError, NameError):
> pass
>
> So, if this should work as intended, we need to check if windSpeed is
> there, or not.
>
> What I want is to
>
> - store whatever wind speed/gust is the higher, if both are present
> - store whatever wind speed/gust, when only one is present
> - store the ultrasonic wind direction if present, or else the other one
>
> For now, I use these expressions, and the loop packets look good, and
> there shouldn't be a need to check for both being present:
>
> [StdCalibrate]
>
> [[Corrections]]
> # For each type, an arbitrary calibration expression can be given.
> # It should be in the units defined in the StdConvert section.
> # Example:
> #foo = foo + 0.2
> windSpeed = ws90_windSpeed if 'windSpeed' not in locals() or
> ws90_windSpeed > windSpeed else windSpeed
> windGust = ws90_windGust if 'windGust' not in locals() or
> ws90_windGust > windGust else windGust
> windDir = ws90_windDir if 'ws90_windDir' in locals() and
> ws90_windDir is not None else windDir
>
> I think this way I think I get my desired results, but after a long week
> my brain is a bit overloaded. So if anybody with cognitive capacities left
> could check if my expressions really make that much sense: very much
> appreciated :)
>
> [email protected] schrieb am Samstag, 9. März 2024 um 08:15:24 UTC+1:
>
>> Actually
>>
>> *outTemp = 44 if outTemp in locals() else None*
>>
>>
>> yields *None* when *outTemp * is there.
>>
>> Since we are looking for the key '*outTemp' *and not it's value, our
>> expression needs to be:
>>
>> *outTemp = 44 if 'outTemp' in locals() else None*
>>
>>
>>
>> Tom Keffer schrieb am Samstag, 9. März 2024 um 03:22:24 UTC+1:
>>
>>> The facility uses the Python function eval
>>> <https://docs.python.org/3/library/functions.html#eval>. A dictionary
>>> with key 'math' and value the math module is passed in for *globals*.
>>> The record is passed in for *locals*. So, you could use the expression
>>>
>>> *outTemp = 44 if outTemp in locals() else None*
>>>
>>>
>>>
>>>
>>> On Fri, Mar 8, 2024 at 3:33 PM Graham Eddy <[email protected]> wrote:
>>>
>>>> oops, python syntax would be: expr if ops_tye in globals() else None
>>>> *⊣GE⊢*
>>>>
>>>> On 9 Mar 2024, at 10:31 am, Graham Eddy <[email protected]> wrote:
>>>>
>>>> i think ' if obs_type in globals() then expr else None ' would work
>>>> *⊣GE⊢*
>>>>
>>>> On 9 Mar 2024, at 9:13 am, '[email protected]' via weewx-user <
>>>> [email protected]> wrote:
>>>>
>>>> I think I remember that this has been asked before, how to check with
>>>> an expression in Corrections, if an obs_type is present?
>>>>
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