Debian Install and python issue

[Michael McClane]

I've had trouble installing Weewx on Debian 10 with a Weatherflow Tempest.  I decided to check python version - 2.7.16.  So I sudo apt-get remove weewx and start to reinstall.  After executing the config apt, I check and still have python 2.7.16.

I can update to python 3.7, but don' know if there's an impact on Weewx.

mrmccla@Buster:/etc/weewx$ wget -qO - http://weewx.com/keys.html | sudo apt-key add -

OK
mrmccla@Buster:/etc/weewx$ wget -qO - http://weewx.com/apt/weewx-python3.list | sudo tee /etc/apt/sources.list.d/weewx.list
deb [arch=all] http://weewx.com/apt/python3 buster main
mrmccla@Buster:/etc/weewx$ sudo apt-get update
Hit:1 http://security.debian.org buster/updates InRelease
Hit:2 http://weewx.com/apt/python3 buster InRelease             
Hit:3 http://mirror.steadfast.net/debian buster InRelease   
Hit:4 http://mirror.steadfast.net/debian buster-updates InRelease
Reading package lists... Done
mrmccla@Buster:/etc/weewx$ python -V
Python 2.7.16

[Tom Keffer]

The Debian install instructions have you either 'wget' weewx-python2.list or weewx-python3.list. Truth be told: either way, you get the same version of WeeWX. The difference is in the dependencies. So, if you intend to use Python 3 (and you should), you want weewx-python3.list. It will install the Python3 dependencies. Looks like that's exactly what you did.

As far as which version of Python gets invoked when you type the command 'python', well, that depends on the OS. For Debian 10, it's Python 2. However, to use Python 3, it's easy enough. Just use the command 'python3':

python3 -V

Python 3.7.3

If you use weewx-python3.list, the package installer will automatically make sure the right version of Python (Python 3) gets invoked when you run weewxd, or any of the utilities.

Hope that helps

-tk

-tk

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