Hi tom,
In the alarm.py how would I put the None check in the code rather than make
the expression have the check code.
I think it's on this line:
if eval(self.expression, None, record): # NOTE 3
Would it be:
if record is not None and eval(self.expression, None, record):
# NOTE 3
I am not a python programmer by the way. That way if any expression that
could be none would be covered. IE you could put in rain > 0.0
Thanks
On Sunday, 10 May 2020 21:29:14 UTC+10, Tom Keffer wrote:
>
> I suspect 'rain' occasionally has the value 'None', which cannot be
> compared to zero. Try this expression instead
>
> expression = 'rain is not None and rain > 0.0'
>
> -tk
>
>
> On Sat, May 9, 2020 at 9:38 PM Ian Prescott <[email protected]
> <javascript:>> wrote:
>
>> Hi I have a fineoffset usb weather station which has been running
>> raspbian stretch and weewx 3.9 ok and using alarm.py with no issues.
>> For weewx 4 I decided to start from fresh, new sd card, new raspbian
>> buster, and a fresh weewx install.
>> After a of couple learner hicups I now have weewx 4 using buster and
>> python 3 up and running.
>> However I have hit a wall with alarm.py
>> If I use expression = "rain > 0.0" then weewx crashes.
>> If I use expression = "outTemp < 30.0" then weewx keeps running but no
>> email is ever received.
>>
>> So after a search of the forum I found this command
>> sudo PYTHONPATH=/usr/share/weewx python3 /usr/share/weewx/user/alarm.py
>> /etc/weewx/weewx.conf
>> This ran ok and I got an email
>>
>> I have attached my weewx.conf and the log from when I start weewx to when
>> it crashes using expression = "rain > 0.0".
>> I have no idea how to get any useful info regarding expression = "outTemp
>> < 30.0", there doesn't appear to be anything unusual in the log.
>>
>> Thanks
>>
>> and again a fantastic program and a great learning experience.
>>
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