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

hey MRob,

answers inline

On 14.02.2025 10:20, MRob via Duplicity-talk wrote:
> 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this is a very outdated unmaintained version of duplicity.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.

> On 2025-02-14 08:52, MRob via Duplicity-talk wrote:
>> Hellos, sorry for another question maybe you'd had before. I tried so hard searching web for my answer but it's many conflicting opionions, but nothing that work.
>>
>> On CentOS 9 flavor, I want to install: Duplicity, B2, par2 so I can migrate from older CentOS
>>
>> dnf install python3-pip duplicity par2cmdline
>> pip install b2 b2sdk
>>
>> All good? When running duplicity, error comes:
>> BackendException: Could not initialize backend: No module named 'b2sdk'
>>
>> I see b2sdk in /usr/local/lib/python3.9/site-packages/b2sdk
>>
>> Why cannot duplicity see b2sdk?
>> Advance thank!

probably the same issue as
  https://gitlab.com/duplicity/duplicity/-/issues/833

duplicity 3.0.2 contains a fix that will at least allow you to pinpoint the underlying issue. if it is the same issue you may try the workaround mentioned here
  https://gitlab.com/duplicity/duplicity/-/issues/833#note_2022152464

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.

good luck ..ede/duply.net

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