Support python 3.11

[AyanSinhaMahapatra]

Fixes #2730

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[pombredanne]

Here is a chat log with wonderful @SnoopJ on #python ! thank you

pombreda> Philippe Ombredanne Hiya, fierce pythonista ... why would this code fail only on Python 3.11 (and not any of 3.6 to 3.10) https://dev.azure.com/nexB/scancode-toolkit/_build/results?buildId=9632&view=logs&j=71924f90-629a-5f64-5467-4f9bed474c97&t=7cd9e9da-3c04-5bed-99f7-c0d42cb54f3b&l=641
11:10 PM https://github.com/nexB/scancode-toolkit/blob/support-py-311/src/packagedcode/models.py#L744
11:10 PM
Philippe Ombredanne did super() change in 3.11?

SnoopJ> snoopj pombreda, looks like something did change, some discussion here in attrs and a linked upstream issue: python-attrs/attrs#907
11:15 PM
Philippe Ombredanne SnoopJ: ah, this would in attrs! good catch!
11:15 PM
snoopj pombreda, it looks like this was fixed in attrs 22.1
11:15 PM
Philippe Ombredanne *you rock
11:16 PM
Philippe Ombredanne acresearch: pyenv is my friend for this ;)
11:16 PM
snoopj pombreda, it looks like spelling out the super() explicitly can work around the issue if you can't upgrade attrs. New bug to me :)

So the failures in https://dev.azure.com/nexB/44deaec8-15bb-470e-b20f-1e2c33a64c65/_apis/build/builds/9632/logs/142 on Python 3.11 is because of attrs-based classes:

2023-01-16T13:19:56.0426971Z > assert result.exit_code == expected_rc, error 2023-01-16T13:19:56.0427278Z E AssertionError: 2023-01-16T13:19:56.0427518Z E Failure to run: 2023-01-16T13:19:56.0427759Z E rc: 1 2023-01-16T13:19:56.0428468Z E scancode --package /home/vsts/work/1/s/tests/scancode/data/rpm/fping-2.4-0.b2.rhfc1.dag.i386.rpm --json /tmp/scancode-tk-tests -pyolaih8/v1olxgsg/td/tf.results.json --test-mode --verbose 2023-01-16T13:19:56.0429138Z E output: 2023-01-16T13:19:56.0429403Z E Setup plugin: scan:licenses... 2023-01-16T13:19:56.0429717Z E Setup plugin: scan:packages... 2023-01-16T13:19:56.0430124Z E Setup plugin: post_scan:license-references... 2023-01-16T13:19:56.0430481Z E Setup plugin: output:json... 2023-01-16T13:19:56.0430784Z E Collect file inventory... 2023-01-16T13:19:56.0431089Z E Scan files for: packages with 1 process(es)... 2023-01-16T13:19:56.0431616Z E Scanned: /home/vsts/work/1/s/tests/scancode/data/rpm/fping-2.4-0.b2.rhfc1.dag.i386.rpm 2023-01-16T13:19:56.0432211Z E Scanned: /home/vsts/work/1/s/tests/scancode/data/rpm/fping-2.4-0.b2.rhfc1.dag.i386.rpm 2023-01-16T13:19:56.0432584Z E Filter scans... 2023-01-16T13:19:56.0432842Z E Filter scan: packages... 2023-01-16T13:19:56.0433171Z E Run post-scans... 2023-01-16T13:19:56.0433533Z E Run post-scan: license-references... 2023-01-16T13:19:56.0433823Z E Save scan results... 2023-01-16T13:19:56.0434288Z E Save scan results as: json... 2023-01-16T13:19:56.0434663Z E Scanning done. 2023-01-16T13:19:56.0434942Z E Some files failed to scan properly: 2023-01-16T13:19:56.0435367Z E Path: fping-2.4-0.b2.rhfc1.dag.i386.rpm 2023-01-16T13:19:56.0435703Z E ERROR: for scanner: packages: 2023-01-16T13:19:56.0435987Z E ERROR: Unknown error: 2023-01-16T13:19:56.0436294Z E Traceback (most recent call last): 2023-01-16T13:19:56.0436694Z E File "/home/vsts/work/1/s/src/scancode/interrupt.py", line 91, in interruptible 2023-01-16T13:19:56.0437110Z E return NO_ERROR, func(*(args or ()), **(kwargs or {})) 2023-01-16T13:19:56.0437438Z E ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2023-01-16T13:19:56.0437810Z E File "/home/vsts/work/1/s/src/scancode/api.py", line 308, in get_package_data 2023-01-16T13:19:56.0438244Z E return dict(package_data=[pd.to_dict() for pd in package_datas]) 2023-01-16T13:19:56.0438600Z E ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2023-01-16T13:19:56.0439071Z E File "/home/vsts/work/1/s/src/scancode/api.py", line 308, in <listcomp> 2023-01-16T13:19:56.0439493Z E return dict(package_data=[pd.to_dict() for pd in package_datas]) 2023-01-16T13:19:56.0440019Z E ^^^^^^^^^^^^ 2023-01-16T13:19:56.0440569Z E File "/home/vsts/work/1/s/src/packagedcode/models.py", line 744, in to_dict 2023-01-16T13:19:56.0441029Z E mapping = super().to_dict(with_details=with_details, **kwargs) 2023-01-16T13:19:56.0441386Z E ^^^^^^^ 2023-01-16T13:19:56.0441757Z E TypeError: super(type, obj): obj must be an instance or subtype of type 

Here the super is a hierarchy of attrs objects.

The issue is python-attrs/attrs#907 and was fixed by @hynek in python-attrs/attrs#969 ... Thank you ++ @hynek ... you rock too!

The simple fix is to bump attrs to >= 22.1

[pombredanne]

All green and good looking. Thank you.