Chris Angelico <ros...@gmail.com> wrote: > On Wed, Aug 19, 2020 at 3:36 AM Chris Green <c...@isbd.net> wrote: > > > > I have a fairly simple Python program that I wrote a while ago in > > Python 2 that transfers images from my camera to a date ordered > > directory hierarchy on my computer. > > > > I am trying to get it to work on Python 3 as I have just upgraded to > > Ubuntu 20.04 and on that Python 3 is now the default version of Python. > > > > I seem to be descending into a horrible morass of dependencies (or > > failed dependencies) when I try to install pyexiv2 (pr py3exiv2) using > > pip3. > > > > Can anyone point me at anywhere that might have some documentation > > that will help? > > > > The first problem (it might be the whole problem, I'm not sure) is > > which 'pyexiv2' I should be installing, there seem to be several > > apparently competing versions and it's not at all clear which is the > > most likely to work. On pypi there's py3exiv2 and pyexiv2 both of > > which claim to be for Python 3. On the http://py3exiv2.tuxfamily.org/ > > page it states: "py3exiv2 is the Python 3 version of pyexiv2 written > > for Python 2, ...", really! no wonder I'm confused. > > > > Essentially I need the python-pyexiv2 package for Ubuntu 20.04 and > > it's only available up to 19.10. > > > > You might be partly out of luck. I'm not seeing any pyexiv package for > Python 3 either in Ubuntu or Debian. But there is another way: you > might be able to just install it with pip. You mentioned that it's on > PyPI, so try this: > > python3 -m pip install py3exiv2 > > (best inside a virtual environment, but otherwise you might need sudo) > > My reading of the PyPI pages is that the original Python 2 library was > created by one person (Michael Vanslembrouck), and then someone else > (VinsS) did the Python 3 port, which means it had to get a different > name. > Yes, but trying to install it with pip[3] was what took me down into dependency hell, maybe I should persevere.
> You could agitate to get py3exiv2 added to the Ubuntu repositories, > but in the meantime, if you can install it with pip, that should be > viable. I install most things using pip, but then, I also tend to have > versions of Python that aren't supported by upstream (*cough* > currently running 3.10...) :) > I have quite a lot of things installed with pip, however I've never had this problem with dependencies before. Adding to the fun is that my system has still got Python 2 as the default Python so I have to run pip3 explicitly to get Python 3 code. Maybe I should bite the bullet and make Python 3 the default Python and see what falls over as a consequence. -- Chris Green ยท -- https://mail.python.org/mailman/listinfo/python-list