Re: CentOS/Rocky 9 Installation Err - B2 and Duplicity

>> b2sdk 2.8.0
>> b2 4.3.0
>> duplicity 0.8.23
> 
> this is a very outdated unmaintained version of duplicity. consider 
> upgrading using python venv or the like.

I see there is version 3.0.3.2 in pip?
https://pypi.org/project/duplicity

I try to first see about get new version of duplicity:
pip install duplictiy
ERROR: Could not find a version that satisfies the requirement duplictiy 
(from versions: none)
ERROR: No matching distribution found for duplictiy

Maybe i hav to use pipx?
pip install pipx ---> success, but errors building duplicity because 
missing Python.h and librsync.h because hadnt installed *dev packages.

dnf install python3-devel librsync-devel
pipx install duplicity
Now duplicity is working. Thank you

A note about installation documentation: it say this is important, but 
its only error "no such option: --update"
python3 -m pip install --update pip pipx

Dunno if yuo care but I did install patch you gave below before I 
changed version. In case it is helpful:

> if you are stuck with your ancient duplicity version you may apply this 
> patch manually
>  https://gitlab.com/duplicity/duplicity/-/merge_requests/250/diffs
> and `duplicity -v9 ...` should output the issue for b2sdk failing to 
> import.

The file was bits different, there are 4 errs-- last one for import b2 
instead of b2sdk. ANwayz, heres the trace it caused (sorry i didnt use 
-v9 so maybe not helpful. I can renstall duplicity from dnf if you want 
to have this feedbakc):

Traceback (innermost last):
   File "/usr/bin/duplicity", line 87, in <module>
     with_tempdir(main)
   File "/usr/bin/duplicity", line 70, in with_tempdir
     fn()
   File "/usr/lib64/python3.9/site-packages/duplicity/dup_main.py", line 
1567, in main
     action = commandline.ProcessCommandLine(sys.argv[1:])
   File "/usr/lib64/python3.9/site-packages/duplicity/commandline.py", 
line 1244, in ProcessCommandLine
     config.backend = backend.get_backend(args[0])
   File "/usr/lib64/python3.9/site-packages/duplicity/backend.py", line 
223, in get_backend
     obj = get_backend_object(url_string)
   File "/usr/lib64/python3.9/site-packages/duplicity/backend.py", line 
209, in get_backend_object
     return factory(pu)
   File 
"/usr/lib64/python3.9/site-packages/duplicity/backends/par2backend.py", 
line 61, in __init__
     self.wrapped_backend = 
backend.get_backend_object(parsed_url.url_string)
   File "/usr/lib64/python3.9/site-packages/duplicity/backend.py", line 
209, in get_backend_object
     return factory(pu)
   File 
"/usr/lib64/python3.9/site-packages/duplicity/backends/b2backend.py", 
line 83, in __init__
     log.Debug("".join(traceback.format_exception(None, e1, 
e1.__traceback__)))
  UnboundLocalError: local variable 'traceback' referenced before 
assignment

My b2sdk is in
/usr/local/lib/python3.9/site-packages/b2sdk

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