I was able to solve this problem by simply relaxing the version requirement
for Pillow. Instead of >=8.2, I set it to >=5.2, the first version that
supports Python 3.7. This will cause slight alignment problems in the
images, but I don't think it will be anything serious.

So now weewx can use the native version of Pillow, and nothing is broken.

In v5.0.0a19.

-tk

On Tue, Feb 21, 2023 at 11:46 AM Lucas Heijst <[email protected]> wrote:

>
> Tom and Vince,
>
> This is how I installed bulleye, pip and weewx:
>
> I used PI imager to write bullseye to an USB stick, setup for user wx and
> for my wifi
>
> After I logged in with user wx the following sequence was done:
> sudo su
> sudo passwd root
> sudo apt update && sudo apt upgrade
> sudo apt install gcc python3-dev python3-pip
> sudo apt install sshpass nginx  (extra)
> sudo apt autoremove (one not longer used package)
> pip3 install wheel  (was already present)
> pip3 install weewx --user  (version a17 presented as a16)
>
> Luc
> Op dinsdag 21 februari 2023 om 16:42:51 UTC-3 schreef Tom Keffer:
>
>> Same conclusions here. The mystery is why Pillow didn't install an
>> appropriate version of libopenjp2.
>>
>> It seems like a fundamental problem, yet if I search the web I can only
>> find solutions that are inappropriate or don't work. For example, one
>> suggested removing PIL first, then installing Pillow, which I did. No
>> relief.
>>
>> On Tue, Feb 21, 2023 at 11:38 AM Vince Skahan <[email protected]> wrote:
>>
>>> On a current RaspiOS both 'pip' and 'pip3' are installed by the
>>> python3-pip dpkg according to "dpkg -S /usr/bin/pip3 /usr/bin/pip"
>>>
>>> I reflashed a SD to current RaspiOS and installed 5.0.0a18 via pip
>>> --user and also recreated the issue.   Adding the libopenjp2-7 package
>>> fixed it here too.
>>>
>>> FWIW, I had an old debian_version 11.2 pi3 SD card with Pillow 8.1 that
>>> did work ok with the v5 software, but I previously had an old v4 setup.py
>>> installation there.  My 'guess' is that old Pillow version was current at
>>> that point in time many months ago so that's why it was there.  Regardless,
>>> installing v5 on the ancient SD didn't upgrade Pillow from 8.x to 9.x if
>>> that was what was supposed to happen.
>>>
>>> A clean RaspiOS and clean weewx os installs and runs ok, once that
>>> libopenjp2-7 package is installed on a pi3.
>>>
>>> On Tuesday, February 21, 2023 at 11:03:03 AM UTC-8 Tom Keffer wrote:
>>> On Tue, Feb 21, 2023 at 10:55 AM Lucas Heijst <[email protected]>
>>> wrote:
>>> Vince, I noticed on my system pip is not in directory site-packages
>>>
>>> How did you install pip? It does not come with bullseye. If you did
>>> "sudo apt install python3-pip" it will go into
>>> /usr/lib/python3/dist-packages, not /root/.local, nor /usr/local/lib.
>>>
>>> -tk
>>>
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