[Evolution] extract images from mail account

[Herr Oswald <herr_oswald gmx de>]

Hi friends,

does evolution have a feature which can extract all images attached or
embedded from a number of selected messages? - I couldnt find such...

What I could find is a py script which should do the job from a mbox
file - which would be perfect for me:

http://www.chuck-jackson-photos.com/mboxattachments/

But it does not run on my machine (ubuntu 18.04), when executing, it
throws this error - with python 2.7 as well as 3.6:

$ mboxattachments --exportpath images rollentausch.mbox
Traceback (most recent call last):
  File "/usr/local/bin/mboxattachments", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 3112, in <module>
    @_call_aside
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 3096, in _call_aside
    f(*args, **kwargs)
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 3125, in
_initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 578, in _build_master
    ws.require(__requires__)
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 895, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/home/wd/.local/lib/python3.6/site-
packages/pkg_resources/__init__.py", line 781, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'mboxattachments==0.5.35'
distribution was not found and is required by the application

Can somebody give me a useful hint?

Cheers,
Wolf