On Wednesday, 9 May 2018 11:52:58 UTC+10, Thomas Keffer wrote:
>
> As you're writing code for WeeWX, whether it's a search list extension, a 
> new service, or a driver, it's useful to get in the habit of checking 
> whether a value could be None. It's how WeeWX signals that a datum is 
> missing or bad. 
>

Am I on the right track with this snippet? I wasn't able to find any 
examples and I'm new to python/cheetah

#if ($current.outTemp.degree_F.raw is not None and 
$current.dewpoint.degree_F.raw is not None and $station.altitude.foot.raw 
is not None)
#set $cloudHeight = round((($current.outTemp.degree_F.raw - 
$current.dewpoint.degree_F.raw) * 1000 / 4.4 + $station.altitude.foot.raw) 
* .3048, 0)
$cloudHeight|#slurp
#else
|#slurp
#end if
 

>

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