If you use python3, you need python3 versions of all python modules 'and' 
python3-compatible versions of all drivers, extensions, and skins you 
install.

That should be somewhat obvious I'd hope, given hundreds of posts since v4 
came out with people battling the python3 transition.

On Thursday, April 1, 2021 at 9:14:13 AM UTC-7 [email protected] wrote:

> I didn't see anything in the documentation I read about how to get "the 
> python3 version of the library the driver needs". I know 3 is installed 
> because I installed the pyephem & got it working using pip3. Can someone 
> point me to a procedure to correct this? Thanks.
>
> On Thu, Apr 1, 2021, 10:44 vince <[email protected]> wrote:
>
>> On Thursday, April 1, 2021 at 7:40:48 AM UTC-7 [email protected] wrote:
>>
>>> Apr  1 09:06:07 PI4BUSB weewx[8998]: Starting weewx weather system: 
>>> weewx.
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__: Caught 
>>> unrecoverable exception:
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****  No 
>>> one-wire library found
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****  
>>> Traceback (most recent call last):
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****    File 
>>> "/usr/share/weewx/user/owfs.py", line 264, in <module>
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****      ow 
>>> = OWFSBinding()
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****    File 
>>> "/usr/share/weewx/user/owfs.py", line 202, in __init__
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****      
>>> import ow as owbinding
>>> Apr  1 09:06:07 PI4BUSB weewx[9013] CRITICAL __main__:     ****  
>>> ModuleNotFoundError: No module named 'ow'
>>>
>>>
>> Best guess is you installed weewx 4 which defaults to python3, and you 
>> have not installed the python3 version of the library the driver needs.
>>
>>
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