fix codacy style issues

[codecov[bot]]

Codecov Report

Base: 83.23% // Head: 83.21% // Decreases project coverage by -0.01% :warning:

Coverage data is based on head (a3bc8a3) compared to base (79de65f). Patch coverage: 59.40% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #81 +/- ## =========================================== - Coverage 83.23% 83.21% -0.02% =========================================== Files 46 46 Lines 4222 4218 -4 =========================================== - Hits 3514 3510 -4 Misses 708 708 ``` | [Impacted Files](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics) | Coverage Δ | | |---|---|---| | [covigator/dashboard/figures/samples.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL2Rhc2hib2FyZC9maWd1cmVzL3NhbXBsZXMucHk=) | `100.00% <ø> (ø)` | | | [covigator/pipeline/runner.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL3BpcGVsaW5lL3J1bm5lci5weQ==) | `33.33% <0.00%> (ø)` | | | [covigator/processor/ena\_processor.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL3Byb2Nlc3Nvci9lbmFfcHJvY2Vzc29yLnB5) | `52.00% <ø> (ø)` | | | [covigator/tests/unit\_tests/test\_downloader.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL3Rlc3RzL3VuaXRfdGVzdHMvdGVzdF9kb3dubG9hZGVyLnB5) | `100.00% <ø> (ø)` | | | [covigator/dashboard/figures/recurrent\_mutations.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL2Rhc2hib2FyZC9maWd1cmVzL3JlY3VycmVudF9tdXRhdGlvbnMucHk=) | `21.67% <23.25%> (-0.28%)` | :arrow_down: | | [covigator/database/queries.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL2RhdGFiYXNlL3F1ZXJpZXMucHk=) | `70.12% <66.66%> (ø)` | | | [...gator/precomputations/load\_variants\_per\_lineage.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL3ByZWNvbXB1dGF0aW9ucy9sb2FkX3ZhcmlhbnRzX3Blcl9saW5lYWdlLnB5) | `87.23% <75.00%> (ø)` | | | [covigator/configuration.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL2NvbmZpZ3VyYXRpb24ucHk=) | `85.83% <83.33%> (ø)` | | | [covigator/precomputations/load\_top\_occurrences.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL3ByZWNvbXB1dGF0aW9ucy9sb2FkX3RvcF9vY2N1cnJlbmNlcy5weQ==) | `90.76% <83.33%> (ø)` | | | [covigator/accessor/abstract\_accessor.py](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics#diff-Y292aWdhdG9yL2FjY2Vzc29yL2Fic3RyYWN0X2FjY2Vzc29yLnB5) | `97.14% <100.00%> (ø)` | | | ... and [5 more](https://codecov.io/gh/TRON-Bioinformatics/covigator/pull/81?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics) | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TRON-Bioinformatics)

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