Re: [Duplicity-talk] python3, and a gpg question

[Aaron]

Hello Mike,


On 2019-05-09 22:22, Mike Gorse via Duplicity-talk wrote:
> I was just testing the imap backend on python 3 and had a couple of 
> questions.
>
> Setup.py now has this:
> if sys.version_info[:2] < (3, 5):
>     print("Sorry, duplicity requires version 3.5 or later of Python.")
>
> This check currently excludes python 2. Is that intended? I thought
> that the plan was for 0.8 to support both python 2 and python 3. If
> 0.8 will actually be python 3 only, then that would probably make it
> easier to tidy up the code in some places, but tox.ini still specifies
> that the unit tests should also be run on 2.7.

Yes, you are correct, the plan is for Duplicity 0.8 to be Python 2 and 3 
and for 0.9 to be Python 3 only.

We are a bit late getting a 0.8 release out the door and we are getting 
pretty close to Python 2 going EOL. I do not see a lot of benefit 
continuing to support Python 2 beyond Python 2 EOL.

> Also, I've fixed a few issues with the back end in
> lp:~mgorse/duplicity/0.8-series (mostly string vs. bytes issues and
> email API changes),

Thank you for your Python 3 work, it is really appreciated. If you do 
find Python 3 bugs, please do file them and reference them in the Python 
3 blueprint:
https://blueprints.launchpad.net/duplicity/+spec/python3
Please also feel free to add anything relevant to that blueprint (e.g. 
backends you have tested that work or do not work).

> but I'm getting this error when running
> list-current-files:
>
> GPGError: GPG Failed, see log below:
> ===== Begin GnuPG log =====
> gpg: AES encrypted data
> gpg: gcry_kdf_derive failed: Invalid data
> gpg: encrypted with 1 passphrase
> gpg: decryption failed: No secret key
> ===== End GnuPG log =====
>
> I'm wondering whether anyone has seen this; I'm puzzled by it, since
> it doesn't appear to be an issue of the back end corrupting the data,
> and restore works correctly despite list-current-files failing.

No, it is not one I have come across. Does it work as expected if you 
use Python 2?

Kind regards,

Aaron