[Pywikibot](https://www.mediawiki.org/wiki/Manual:Pywikibot) is a Python library and collection of scripts that automate work on MediaWiki sites. This task will mainly be to fix [W504](https://martin-thoma.com/python-style-guide/#error-codes) errors (line break after binary operator) found in the Pywikibot repository.
Clone Pywikibot from Wikimedia Gerrit: https://gerrit.wikimedia.org/g/pywikibot/core/+/refs/heads/master. Follow steps here: https://gerrit.wikimedia.org/r/plugins/gitiles/pywikibot/core/+/refs/heads/master/README.rst.
Once your done getting Pywikibot core on your local machine, if you want to install it for further experimentation, follow this link: https://www.mediawiki.org/wiki/Manual:Pywikibot/Installation.
Now, to the W504 error, see the GCI task corresponding to the files you're supposed to fix these errors in, here is an example patch: https://gerrit.wikimedia.org/r/c/pywikibot/core/+/469405.
= Notes to GCI participant
Once you're done fixing the errors in the files corresponding to the GCI task, make a patch reference this task using `Bug: TXXX` syntax. See https://www.mediawiki.org/wiki/Gerrit/Commit_message_guidelines for how to write a proper commit message for Wikimedia Gerrit.
Below are the files with the W504 errors;
```
./docs/conf.py:287:17: W504 line break after binary operator
./scripts/imagetransfer.py:203:41: W504 line break after binary operator
./scripts/imagetransfer.py:271:29: W504 line break after binary operator
./scripts/imagetransfer.py:272:29: W504 line break after binary operator
./scripts/listpages.py:160:17: W504 line break after binary operator
./scripts/listpages.py:161:17: W504 line break after binary operator
./scripts/welcome.py:800:31: W504 line break after binary operator
./scripts/nowcommons.py:278:25: W504 line break after binary operator
./scripts/cfd.py:147:21: W504 line break after binary operator
./scripts/cfd.py:153:21: W504 line break after binary operator
./scripts/pagefromfile.py:157:21: W504 line break after binary operator
./scripts/casechecker.py:376:41: W504 line break after binary operator
./scripts/casechecker.py:526:27: W504 line break after binary operator
./scripts/table2wiki.py:429:23: W504 line break after binary operator
./scripts/table2wiki.py:511:41: W504 line break after binary operator
./scripts/solve_disambiguation.py:870:25: W504 line break after binary operator
./scripts/solve_disambiguation.py:955:29: W504 line break after binary operator
./scripts/solve_disambiguation.py:956:29: W504 line break after binary operator
./scripts/solve_disambiguation.py:998:25: W504 line break after binary operator
./scripts/solve_disambiguation.py:999:26: W504 line break after binary operator
./scripts/solve_disambiguation.py:1000:25: W504 line break after binary operator
./scripts/solve_disambiguation.py:1002:25: W504 line break after binary operator
./scripts/solve_disambiguation.py:1136:17: W504 line break after binary operator
./scripts/checkimages.py:752:17: W504 line break after binary operator
./scripts/checkimages.py:875:23: W504 line break after binary operator
./scripts/checkimages.py:880:21: W504 line break after binary operator
./scripts/checkimages.py:918:29: W504 line break after binary operator
./scripts/checkimages.py:944:29: W504 line break after binary operator
./scripts/checkimages.py:1028:25: W504 line break after binary operator
./scripts/checkimages.py:1262:29: W504 line break after binary operator
./scripts/checkimages.py:1310:43: W504 line break after binary operator
./scripts/match_images.py:86:21: W504 line break after binary operator
./scripts/flickrripper.py:261:17: W504 line break after binary operator
./scripts/isbn.py:1308:17: W504 line break after binary operator
./scripts/isbn.py:1656:21: W504 line break after binary operator
./scripts/isbn.py:1657:21: W504 line break after binary operator
./scripts/interwiki.py:988:15: W504 line break after binary operator
./scripts/interwiki.py:1063:19: W504 line break after binary operator
./scripts/interwiki.py:1064:19: W504 line break after binary operator
./scripts/interwiki.py:1299:23: W504 line break after binary operator
./scripts/interwiki.py:1629:29: W504 line break after binary operator
./scripts/interwiki.py:1640:23: W504 line break after binary operator
./scripts/interwiki.py:1641:23: W504 line break after binary operator
./scripts/interwiki.py:1655:25: W504 line break after binary operator
./scripts/interwiki.py:1656:25: W504 line break after binary operator
./scripts/interwiki.py:1657:25: W504 line break after binary operator
./scripts/interwiki.py:1658:26: W504 line break after binary operator
./scripts/interwiki.py:1659:29: W504 line break after binary operator
./scripts/interwiki.py:1812:21: W504 line break after binary operator
./scripts/interwiki.py:2429:34: W504 line break after binary operator
./scripts/replace.py:634:21: W504 line break after binary operator
./scripts/replace.py:1107:21: W504 line break after binary operator
./scripts/replace.py:1135:13: W504 line break after binary operator
./scripts/newitem.py:141:17: W504 line break after binary operator
./scripts/imagecopy_self.py:487:17: W504 line break after binary operator
./scripts/imagecopy_self.py:541:17: W504 line break after binary operator
./scripts/imagecopy_self.py:542:17: W504 line break after binary operator
./scripts/imagecopy_self.py:553:17: W504 line break after binary operator
./scripts/imagecopy_self.py:994:36: W504 line break after binary operator
./scripts/patrol.py:322:56: W504 line break after binary operator
./scripts/upload.py:188:20: W504 line break after binary operator
./scripts/commonscat.py:355:31: W504 line break after binary operator
./scripts/wikisourcetext.py:119:17: W504 line break after binary operator
./scripts/makecat.py:267:9: W504 line break after binary operator
./scripts/category_redirect.py:156:57: W504 line break after binary operator
./scripts/clean_sandbox.py:204:39: W504 line break after binary operator
./scripts/fixing_redirects.py:118:19: W504 line break after binary operator
./scripts/fixing_redirects.py:119:19: W504 line break after binary operator
./scripts/fixing_redirects.py:120:19: W504 line break after binary operator
./scripts/fixing_redirects.py:122:19: W504 line break after binary operator
./scripts/imagecopy.py:278:15: W504 line break after binary operator
./scripts/imagecopy.py:279:15: W504 line break after binary operator
./scripts/imagecopy.py:585:22: W504 line break after binary operator
./scripts/delete.py:201:21: W504 line break after binary operator
./scripts/weblinkchecker.py:615:17: W504 line break after binary operator
./scripts/image.py:93:30: W504 line break after binary operator
./scripts/interwikidata.py:75:17: W504 line break after binary operator
./scripts/category.py:936:21: W504 line break after binary operator
./scripts/category.py:1198:57: W504 line break after binary operator
./scripts/unusedfiles.py:58:17: W504 line break after binary operator
./scripts/unusedfiles.py:71:17: W504 line break after binary operator
./scripts/reflinks.py:181:5: W504 line break after binary operator
./scripts/reflinks.py:183:5: W504 line break after binary operator
./scripts/lonelypages.py:85:13: W504 line break after binary operator
./scripts/lonelypages.py:86:13: W504 line break after binary operator
./scripts/script_wui.py:291:17: W504 line break after binary operator
./scripts/redirect.py:217:25: W504 line break after binary operator
./scripts/redirect.py:364:18: W504 line break after binary operator
./scripts/version.py:49:13: W504 line break after binary operator
./scripts/version.py:50:13: W504 line break after binary operator
./scripts/maintenance/download_dump.py:112:38: W504 line break after binary operator
./scripts/maintenance/download_dump.py:147:55: W504 line break after binary operator
./scripts/maintenance/download_dump.py:148:55: W504 line break after binary operator
./scripts/maintenance/download_dump.py:155:41: W504 line break after binary operator
./scripts/maintenance/download_dump.py:190:38: W504 line break after binary operator
./scripts/archive/featured.py:568:21: W504 line break after binary operator
./scripts/archive/featured.py:576:33: W504 line break after binary operator
./scripts/archive/featured.py:577:33: W504 line break after binary operator
./scripts/archive/featured.py:590:21: W504 line break after binary operator
./scripts/archive/featured.py:591:21: W504 line break after binary operator
./pywikibot/bot_choice.py:130:17: W504 line break after binary operator
./pywikibot/bot_choice.py:220:17: W504 line break after binary operator
./pywikibot/bot_choice.py:237:21: W504 line break after binary operator
./pywikibot/bot_choice.py:326:26: W504 line break after binary operator
./pywikibot/bot_choice.py:327:26: W504 line break after binary operator
./pywikibot/bot.py:819:30: W504 line break after binary operator
./pywikibot/bot.py:821:30: W504 line break after binary operator
./pywikibot/bot.py:1604:17: W504 line break after binary operator
./pywikibot/bot.py:2101:21: W504 line break after binary operator
./pywikibot/bot.py:2102:25: W504 line break after binary operator
./pywikibot/bot.py:2172:25: W504 line break after binary operator
./pywikibot/specialbots.py:212:43: W504 line break after binary operator
./pywikibot/specialbots.py:421:17: W504 line break after binary operator
./pywikibot/diff.py:359:25: W504 line break after binary operator
./pywikibot/diff.py:503:34: W504 line break after binary operator
./pywikibot/diff.py:504:34: W504 line break after binary operator
./pywikibot/diff.py:522:25: W504 line break after binary operator
./pywikibot/diff.py:537:32: W504 line break after binary operator
./pywikibot/diff.py:538:32: W504 line break after binary operator
./pywikibot/proofreadpage.py:864:17: W504 line break after binary operator
./pywikibot/proofreadpage.py:865:17: W504 line break after binary operator
./pywikibot/i18n.py:838:13: W504 line break after binary operator
./pywikibot/config2.py:335:17: W504 line break after binary operator
./pywikibot/config2.py:340:17: W504 line break after binary operator
./pywikibot/config2.py:1075:13: W504 line break after binary operator
./pywikibot/config2.py:1118:14: W504 line break after binary operator
./pywikibot/config2.py:1179:9: W504 line break after binary operator
./pywikibot/config2.py:1184:9: W504 line break after binary operator
./pywikibot/login.py:271:21: W504 line break after binary operator
./pywikibot/login.py:272:21: W504 line break after binary operator
./pywikibot/cosmetic_changes.py:627:46: W504 line break after binary operator
./pywikibot/cosmetic_changes.py:672:27: W504 line break after binary operator
./pywikibot/cosmetic_changes.py:713:13: W504 line break after binary operator
./pywikibot/cosmetic_changes.py:954:25: W504 line break after binary operator
./pywikibot/page.py:202:34: W504 line break after binary operator
./pywikibot/page.py:337:17: W504 line break after binary operator
./pywikibot/page.py:423:35: W504 line break after binary operator
./pywikibot/page.py:486:17: W504 line break after binary operator
./pywikibot/page.py:1312:20: W504 line break after binary operator
./pywikibot/page.py:1313:19: W504 line break after binary operator
./pywikibot/page.py:1314:19: W504 line break after binary operator
./pywikibot/page.py:1319:16: W504 line break after binary operator
./pywikibot/page.py:4027:29: W504 line break after binary operator
./pywikibot/page.py:5196:17: W504 line break after binary operator
./pywikibot/page.py:5200:17: W504 line break after binary operator
./pywikibot/page.py:5204:17: W504 line break after binary operator
./pywikibot/page.py:5217:21: W504 line break after binary operator
./pywikibot/page.py:5220:17: W504 line break after binary operator
./pywikibot/page.py:5611:21: W504 line break after binary operator
./pywikibot/pagegenerators.py:521:17: W504 line break after binary operator
./pywikibot/pagegenerators.py:522:17: W504 line break after binary operator
./pywikibot/pagegenerators.py:523:17: W504 line break after binary operator
./pywikibot/pagegenerators.py:524:17: W504 line break after binary operator
./pywikibot/pagegenerators.py:525:17: W504 line break after binary operator
./pywikibot/pagegenerators.py:526:21: W504 line break after binary operator
./pywikibot/textlib.py:240:36: W504 line break after binary operator
./pywikibot/textlib.py:241:36: W504 line break after binary operator
./pywikibot/textlib.py:424:21: W504 line break after binary operator
./pywikibot/textlib.py:612:35: W504 line break after binary operator
./pywikibot/textlib.py:1044:26: W504 line break after binary operator
./pywikibot/textlib.py:1140:28: W504 line break after binary operator
./pywikibot/textlib.py:1141:28: W504 line break after binary operator
./pywikibot/textlib.py:1154:28: W504 line break after binary operator
./pywikibot/textlib.py:1155:28: W504 line break after binary operator
./pywikibot/textlib.py:1175:36: W504 line break after binary operator
./pywikibot/textlib.py:1176:36: W504 line break after binary operator
./pywikibot/textlib.py:1645:29: W504 line break after binary operator
./pywikibot/textlib.py:2318:17: W504 line break after binary operator
./pywikibot/site_detect.py:108:17: W504 line break after binary operator
./pywikibot/site_detect.py:120:13: W504 line break after binary operator
./pywikibot/site_detect.py:174:30: W504 line break after binary operator
./pywikibot/site_detect.py:205:17: W504 line break after binary operator
./pywikibot/site_detect.py:288:25: W504 line break after binary operator
./pywikibot/site.py:1789:17: W504 line break after binary operator
./pywikibot/site.py:2283:29: W504 line break after binary operator
./pywikibot/site.py:2286:25: W504 line break after binary operator
./pywikibot/site.py:2903:17: W504 line break after binary operator
./pywikibot/site.py:2904:17: W504 line break after binary operator
./pywikibot/site.py:3477:25: W504 line break after binary operator
./pywikibot/site.py:3478:26: W504 line break after binary operator
./pywikibot/site.py:4058:19: W504 line break after binary operator
./pywikibot/site.py:4059:19: W504 line break after binary operator
./pywikibot/site.py:4060:19: W504 line break after binary operator
./pywikibot/site.py:4061:19: W504 line break after binary operator
./pywikibot/site.py:4062:19: W504 line break after binary operator
./pywikibot/site.py:4063:19: W504 line break after binary operator
./pywikibot/site.py:4064:19: W504 line break after binary operator
./pywikibot/site.py:4065:19: W504 line break after binary operator
./pywikibot/site.py:4066:19: W504 line break after binary operator
./pywikibot/site.py:4987:40: W504 line break after binary operator
./pywikibot/site.py:6253:21: W504 line break after binary operator
./pywikibot/site.py:7581:61: W504 line break after binary operator
./pywikibot/site.py:7941:17: W504 line break after binary operator
./pywikibot/site.py:7942:17: W504 line break after binary operator
./pywikibot/family.py:1605:9: W504 line break after binary operator
./pywikibot/family.py:1606:9: W504 line break after binary operator
./pywikibot/family.py:1611:9: W504 line break after binary operator
./pywikibot/family.py:1612:9: W504 line break after binary operator
./pywikibot/family.py:1618:9: W504 line break after binary operator
./pywikibot/family.py:1619:9: W504 line break after binary operator
./pywikibot/family.py:1620:9: W504 line break after binary operator
./pywikibot/__init__.py:578:21: W504 line break after binary operator
./pywikibot/date.py:387:21: W504 line break after binary operator
./pywikibot/date.py:388:21: W504 line break after binary operator
./pywikibot/tools/formatter.py:154:30: W504 line break after binary operator
./pywikibot/tools/__init__.py:1433:30: W504 line break after binary operator
./pywikibot/tools/__init__.py:1434:30: W504 line break after binary operator
./pywikibot/tools/__init__.py:1437:30: W504 line break after binary operator
./pywikibot/tools/__init__.py:1518:17: W504 line break after binary operator
./pywikibot/data/api.py:412:30: W504 line break after binary operator
./pywikibot/data/api.py:538:25: W504 line break after binary operator
./pywikibot/data/api.py:697:29: W504 line break after binary operator
./pywikibot/data/api.py:723:51: W504 line break after binary operator
./pywikibot/data/api.py:806:29: W504 line break after binary operator
./pywikibot/data/api.py:1118:30: W504 line break after binary operator
./pywikibot/data/api.py:1153:13: W504 line break after binary operator
./pywikibot/data/api.py:1180:36: W504 line break after binary operator
./pywikibot/data/api.py:1202:17: W504 line break after binary operator
./pywikibot/data/api.py:1536:20: W504 line break after binary operator
./pywikibot/data/api.py:1695:21: W504 line break after binary operator
./pywikibot/data/api.py:1696:21: W504 line break after binary operator
./pywikibot/data/api.py:2039:29: W504 line break after binary operator
./pywikibot/data/api.py:3354:16: W504 line break after binary operator
./pywikibot/data/wikistats.py:82:19: W504 line break after binary operator
./pywikibot/userinterfaces/terminal_interface_unix.py:64:21: W504 line break after binary operator
./pywikibot/userinterfaces/terminal_interface_unix.py:65:21: W504 line break after binary operator
./pywikibot/comms/threadedhttp.py:156:21: W504 line break after binary operator
./pywikibot/comms/threadedhttp.py:174:29: W504 line break after binary operator
./tests/textlib_tests.py:1431:17: W504 line break after binary operator
./tests/script_tests.py:69:16: W504 line break after binary operator
./tests/script_tests.py:70:16: W504 line break after binary operator
./tests/script_tests.py:75:16: W504 line break after binary operator
./tests/script_tests.py:76:16: W504 line break after binary operator
./tests/script_tests.py:187:14: W504 line break after binary operator
./tests/script_tests.py:197:14: W504 line break after binary operator
./tests/script_tests.py:228:27: W504 line break after binary operator
./tests/dry_api_tests.py:225:19: W504 line break after binary operator
./tests/aspects.py:229:50: W504 line break after binary operator
./tests/aspects.py:336:21: W504 line break after binary operator
./tests/aspects.py:595:17: W504 line break after binary operator
./tests/aspects.py:738:36: W504 line break after binary operator
./tests/aspects.py:795:17: W504 line break after binary operator
./tests/aspects.py:853:17: W504 line break after binary operator
./tests/aspects.py:947:21: W504 line break after binary operator
./tests/aspects.py:1014:17: W504 line break after binary operator
./tests/aspects.py:1319:25: W504 line break after binary operator
./tests/aspects.py:1588:25: W504 line break after binary operator
./tests/aspects.py:1641:21: W504 line break after binary operator
./tests/ui_tests.py:458:13: W504 line break after binary operator
./tests/ui_tests.py:459:13: W504 line break after binary operator
./tests/ui_tests.py:468:13: W504 line break after binary operator
./tests/ui_tests.py:469:13: W504 line break after binary operator
./tests/tools_ip_tests.py:703:26: W504 line break after binary operator
./tests/tools_ip_tests.py:710:26: W504 line break after binary operator
./tests/utils.py:680:28: W504 line break after binary operator
./tests/utils.py:687:34: W504 line break after binary operator
./tests/isbn_tests.py:258:29: W504 line break after binary operator
./tests/pagegenerators_tests.py:464:17: W504 line break after binary operator
./tests/__init__.py:235:29: W504 line break after binary operator
./tests/__init__.py:236:29: W504 line break after binary operator
./tests/site_tests.py:702:21: W504 line break after binary operator
```