Add flake8 pre-commit hook

Add flake8 to the pre-commit hooks and add .flake8 configuration file to the top-level project directory (this also means that developer IDEs with flake8 support will use the same flake8 configuration).

Also fix the remaining warnings (mostly in Gaudi/).

Closes #263 (closed).

@clemenci, could we make some progress in merging/validating the various flake8 MRs?

It has been a few messy weeks for me. I'll have a look ASAP (max next week).

changed milestone to %v36r13

assigned to @clemenci

I merged all, flake8 related MRs, but I still have a number of warnings. I can help with the clean up, if you want.

added 29 commits

• 96f5a036...ad393e8c - 26 commits from branch gaudi:master
• 3b4a1272 - Gaudi: flake8 fixes
• 58d8b69a - flake8 fixes for various scripts
• fb35755b - Add flake8 pre-commit hook

Compare with previous version

marked this merge request as ready

changed the description

resolved all threads

added lhcb-gaudi-head label

• [2023-04-25 00:04] Validation started with lhcb-gaudi-head#3542
• [2023-04-25 00:26] Validation started with lhcb-run2-gaudi-head#502
• [2023-04-26 00:04] Validation started with lhcb-gaudi-head#3543
• [2023-04-26 00:16] Validation started with lhcb-run2-gaudi-head#503
• [2023-04-27 00:05] Validation started with lhcb-gaudi-head#3544
• [2023-04-27 00:25] Validation started with lhcb-run2-gaudi-head#504
• [2023-04-28 00:05] Validation started with lhcb-gaudi-head#3545
• [2023-04-28 00:21] Validation started with lhcb-run2-gaudi-head#505
• [2023-04-29 01:26] Validation started with lhcb-gaudi-head#3546
• [2023-04-29 01:36] Validation started with lhcb-run2-gaudi-head#506
• [2023-04-30 00:04] Validation started with lhcb-gaudi-head#3547
• [2023-04-30 00:12] Validation started with lhcb-run2-gaudi-head#507
• [2023-05-01 00:04] Validation started with lhcb-gaudi-head#3548
• [2023-05-02 00:04] Validation started with lhcb-gaudi-head#3549
• [2023-05-02 00:11] Validation started with lhcb-run2-gaudi-head#508
• [2023-05-03 00:04] Validation started with lhcb-gaudi-head#3550
• [2023-05-03 00:13] Validation started with lhcb-run2-gaudi-head#509
• [2023-05-04 00:04] Validation started with lhcb-gaudi-head#3551
• [2023-05-04 00:18] Validation started with lhcb-run2-gaudi-head#510
• [2023-05-04 10:17] Validation started with lhcb-gaudi-head#3552
• [2023-05-05 00:04] Validation started with lhcb-gaudi-head#3553
• [2023-05-05 00:26] Validation started with lhcb-run2-gaudi-head#511

mentioned in issue #263 (closed)

mentioned in merge request lhcb/LHCb!4102 (merged)

approved this merge request

merged

mentioned in commit 8cfb95e6