The GDS Way™[1] recommends using Flake8 to lint Python projects.
This commit takes the Flake8 config from Digital Marketplace API[2] and
removes the bits we don’t need.
It changes the `max_complexity` setting to 14, which is the most complex
code we have in this repo currently (we shouldn’t be writing code _more_
complex than what we already have).
This commit also fixes the errors found by Flake8, which includes 6(!)
tests which were never getting run because they had the same names as
existing tests.
Here is a full list of the errors that were found and fixed:
```
./app/__init__.py:2:1: F401 're' imported but unused
./app/__init__.py:4:1: F401 'json' imported but unused
./app/__init__.py:8:1: F401 'dateutil' imported but unused
./app/__init__.py:11:1: F401 'flask.escape' imported but unused
./app/__init__.py:41:1: F401 'app.proxy_fix' imported but unused
./app/__init__.py:129:5: F821 undefined name 'proxy_fix'
./app/__init__.py:221:19: F821 undefined name 'highlight'
./app/__init__.py:221:35: F821 undefined name 'JavascriptLexer'
./app/__init__.py:221:54: F821 undefined name 'HtmlFormatter'
./app/config.py:2:1: F401 'datetime.timedelta' imported but unused
./app/event_handlers.py:2:1: F401 'flask_login.current_user' imported but unused
./app/utils.py:11:1: F401 'dateutil.parser' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.two_factor' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.notifications' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.add_service' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.forgot_password' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.inbound_number' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.styleguide' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.organisations' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.letter_jobs' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.verify' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.conversation' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.api_keys' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.send' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.dashboard' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.jobs' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.manage_users' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.sign_in' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.sign_out' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.code_not_received' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.invites' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.platform_admin' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.providers' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.service_settings' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.index' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.new_password' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.user_profile' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.feedback' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.choose_service' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.templates' imported but unused
./app/main/__init__.py:5:1: F401 'app.main.views.register' imported but unused
./app/main/forms.py:12:1: F401 'wtforms.SelectField' imported but unused
./app/main/views/api_keys.py:37:29: E241 multiple spaces after ':'
./app/main/views/feedback.py:3:1: F401 'flask.flash' imported but unused
./app/main/views/feedback.py:122:17: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/inbound_number.py:1:1: F401 'flask.url_for' imported but unused
./app/main/views/inbound_number.py:1:1: F401 'flask.session' imported but unused
./app/main/views/inbound_number.py:1:1: F401 'flask.redirect' imported but unused
./app/main/views/inbound_number.py:1:1: F401 'flask.request' imported but unused
./app/main/views/inbound_number.py:13:1: F401 'flask.jsonify' imported but unused
./app/main/views/jobs.py:31:1: F401 'app.utils.get_template' imported but unused
./app/main/views/letter_jobs.py:1:1: F401 'datetime' imported but unused
./app/main/views/letter_jobs.py:6:1: F401 'app.format_datetime_24h' imported but unused
./app/main/views/manage_users.py:111:9: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/notifications.py:121:5: F841 local variable 'status_args' is assigned to but never used
./app/main/views/organisations.py:1:1: F401 'flask.request' imported but unused
./app/main/views/service_settings.py:77:9: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/service_settings.py:82:9: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/service_settings.py:420:13: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/sign_in.py:12:1: F401 'flask_login.confirm_login' imported but unused
./app/main/views/sign_in.py:17:1: F401 'app.service_api_client' imported but unused
./app/main/views/sign_in.py:62:13: E123 closing bracket does not match indentation of opening bracket's line
./app/main/views/templates.py:4:1: F401 'flask.json' imported but unused
./app/main/views/templates.py:17:1: F401 'notifications_utils.formatters.escape_html' imported but unused
./app/main/views/templates.py:23:1: F401 'app.utils.get_help_argument' imported but unused
./app/main/views/templates.py:64:13: E123 closing bracket does not match indentation of opening bracket's line
./app/notify_client/service_api_client.py:6:1: F401 '.notification_api_client' imported but unused
./app/notify_client/user_api_client.py:1:1: F401 'uuid' imported but unused
./app/notify_client/user_api_client.py:3:1: F401 'flask.session' imported but unused
./tests/__init__.py:1:1: F401 'csv' imported but unused
./tests/app/main/test_asset_fingerprinter.py:2:1: F401 'os' imported but unused
./tests/app/main/test_asset_fingerprinter.py:4:1: F401 'unittest.mock' imported but unused
./tests/app/main/test_asset_fingerprinter.py:98:9: F841 local variable 'string_with_unicode_character' is assigned to but never used
./tests/app/main/test_errorhandlers.py:2:1: F401 'flask.url_for' imported but unused
./tests/app/main/test_permissions.py:26:13: F841 local variable 'response' is assigned to but never used
./tests/app/main/test_placeholder_form.py:3:1: F401 'wtforms.Label' imported but unused
./tests/app/main/test_placeholder_form.py:11:10: F841 local variable 'req' is assigned to but never used
./tests/app/main/test_two_factor_form.py:10:67: F841 local variable 'req' is assigned to but never used
./tests/app/main/test_two_factor_form.py:23:65: F841 local variable 'req' is assigned to but never used
./tests/app/main/test_two_factor_form.py:37:48: F841 local variable 'req' is assigned to but never used
./tests/app/main/test_two_factor_form.py:51:67: F841 local variable 'req' is assigned to but never used
./tests/app/main/test_two_factor_form.py:65:67: F841 local variable 'req' is assigned to but never used
./tests/app/main/views/test_accept_invite.py:356:5: F841 local variable 'element' is assigned to but never used
./tests/app/main/views/test_activity.py:11:1: F811 redefinition of unused 'mock_get_notifications' from line 11
./tests/app/main/views/test_activity.py:18:1: F401 'datetime.datetime' imported but unused
./tests/app/main/views/test_activity.py:102:5: F841 local variable 'content' is assigned to but never used
./tests/app/main/views/test_activity.py:104:5: F841 local variable 'notification' is assigned to but never used
./tests/app/main/views/test_activity.py:337:5: F841 local variable '_notifications_mock' is assigned to but never used
./tests/app/main/views/test_activity.py:373:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_activity.py:378:9: E121 continuation line under-indented for hanging indent
./tests/app/main/views/test_activity.py:404:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_activity.py:407:9: E121 continuation line under-indented for hanging indent
./tests/app/main/views/test_api_keys.py:354:5: F841 local variable 'response' is assigned to but never used
./tests/app/main/views/test_conversation.py:5:1: F401 'bs4.BeautifulSoup' imported but unused
./tests/app/main/views/test_conversation.py:198:5: F841 local variable 'mock_get_inbound_sms' is assigned to but never used
./tests/app/main/views/test_dashboard.py:53:5: F841 local variable 'mock_template_stats' is assigned to but never used
./tests/app/main/views/test_dashboard.py:72:5: F841 local variable 'mock_template_stats' is assigned to but never used
./tests/app/main/views/test_jobs.py:2:1: F401 'uuid' imported but unused
./tests/app/main/views/test_jobs.py:3:1: F401 'urllib.parse.urlparse' imported but unused
./tests/app/main/views/test_jobs.py:3:1: F401 'urllib.parse.quote' imported but unused
./tests/app/main/views/test_jobs.py:3:1: F401 'urllib.parse.parse_qs' imported but unused
./tests/app/main/views/test_jobs.py:9:1: F401 'app.main.views.jobs.get_status_filters' imported but unused
./tests/app/main/views/test_jobs.py:10:1: F401 'tests.notification_json' imported but unused
./tests/app/main/views/test_letters.py:6:1: F401 'tests.service_json' imported but unused
./tests/app/main/views/test_notifications.py:5:1: F401 'app.utils.REQUESTED_STATUSES' imported but unused
./tests/app/main/views/test_notifications.py:5:1: F401 'app.utils.DELIVERED_STATUSES' imported but unused
./tests/app/main/views/test_notifications.py:5:1: F401 'app.utils.SENDING_STATUSES' imported but unused
./tests/app/main/views/test_notifications.py:5:1: F401 'app.utils.FAILURE_STATUSES' imported but unused
./tests/app/main/views/test_platform_admin.py:242:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_platform_admin.py:247:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_send.py:3:1: F401 'unittest.mock.Mock' imported but unused
./tests/app/main/views/test_send.py:18:1: F811 redefinition of unused 'mock_get_service' from line 18
./tests/app/main/views/test_send.py:18:1: F401 'tests.conftest.multiple_letter_contact_blocks' imported but unused
./tests/app/main/views/test_send.py:18:1: F401 'tests.conftest.no_sms_senders' imported but unused
./tests/app/main/views/test_send.py:18:1: F401 'tests.conftest.multiple_sms_senders' imported but unused
./tests/app/main/views/test_send.py:18:1: F401 'tests.conftest.no_letter_contact_blocks' imported but unused
./tests/app/main/views/test_send.py:102:5: F841 local variable 'response' is assigned to but never used
./tests/app/main/views/test_send.py:870:5: F841 local variable 'response' is assigned to but never used
./tests/app/main/views/test_send.py:1367:5: F841 local variable 'service_id' is assigned to but never used
./tests/app/main/views/test_send.py:1451:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_send.py:1620:80: E226 missing whitespace around arithmetic operator
./tests/app/main/views/test_send.py:1909:13: E126 continuation line over-indented for hanging indent
./tests/app/main/views/test_send.py:1912:9: E121 continuation line under-indented for hanging indent
./tests/app/main/views/test_service_settings.py:13:1: F811 redefinition of unused 'no_reply_to_email_addresses' from line 13
./tests/app/main/views/test_service_settings.py:13:1: F401 'tests.conftest.single_reply_to_email_address' imported but unused
./tests/app/main/views/test_service_settings.py:28:5: E123 closing bracket does not match indentation of opening bracket's line
./tests/app/main/views/test_service_settings.py:104:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:166:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:186:5: F841 local variable 'mocked_get_fn' is assigned to but never used
./tests/app/main/views/test_service_settings.py:217:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:237:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:257:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:307:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:340:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:466:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:555:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:615:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:719:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:874:5: F841 local variable 'page' is assigned to but never used
./tests/app/main/views/test_service_settings.py:902:5: F841 local variable 'page' is assigned to but never used
./tests/app/main/views/test_service_settings.py:954:5: F841 local variable 'page' is assigned to but never used
./tests/app/main/views/test_service_settings.py:986:5: F841 local variable 'page' is assigned to but never used
./tests/app/main/views/test_service_settings.py:1101:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1121:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1271:1: F811 redefinition of unused 'test_set_letter_contact_block_saves' from line 1189
./tests/app/main/views/test_service_settings.py:1433:5: F841 local variable 'page' is assigned to but never used
./tests/app/main/views/test_service_settings.py:1495:5: F841 local variable 'mocked_get_fn' is assigned to but never used
./tests/app/main/views/test_service_settings.py:1540:5: F841 local variable 'mocked_get_fn' is assigned to but never used
./tests/app/main/views/test_service_settings.py:1570:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1589:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1621:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1641:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1658:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1676:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1697:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1759:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_service_settings.py:1775:1: F811 redefinition of unused 'single_reply_to_email_address' from line 13
./tests/app/main/views/test_templates.py:3:1: F401 'uuid' imported but unused
./tests/app/main/views/test_templates.py:11:1: F401 'tests.conftest.mock_get_user' imported but unused
./tests/app/main/views/test_templates.py:514:1: F811 redefinition of unused 'mock_get_user' from line 11
./tests/app/main/views/test_templates.py:672:1: F811 redefinition of unused 'mock_get_user' from line 11
./tests/app/main/views/test_templates.py:795:1: F811 redefinition of unused 'mock_get_user' from line 11
./tests/app/main/views/test_templates.py:835:1: F811 redefinition of unused 'mock_get_user' from line 11
./tests/app/main/views/test_two_factor.py:67:13: E126 continuation line over-indented for hanging indent
./tests/app/notify_client/test_notification_client.py:79:5: F841 local variable 'mock_post' is assigned to but never used
```
1. https://gds-way.cloudapps.digital/manuals/programming-languages/python/linting.html#how-to-use-flake8
2. d5ab8afef4/.flake8
We have a bunch of different styles of handling when function
definitions span multiple lines, which they almost always do with tests.
Here’s why an argument per line, single indent is best:
- cleaner diffs when you change the name of a method (one line change
instead of multiple lines)
- works better on narrow screens, eg Github’s diff view, or with two
terminals side by side on a laptop screen
- works with any editor’s indenting shortcuts, no need for an IDE
Also, trailing comma in the list of arguments is good because adding a
new argument to a method becomes a one line, not two line diff.
Makes uses of the additions to utils in https://github.com/alphagov/notifications-utils/pull/9
This commit strips out a lot of the complex stuff that the views and templates
in this app were doing. There is now a cleaner separation of concerns:
- utils returns the number and type of errors in the csv
- `get_errors_for_csv` helper in this app maps the number and type of errors
onto human-friendly error messages
- the view and template just doing the glueing-together of all the pieces
This is (hopefully) easier to understand, definitely makes the component
parts easier to test in isolation, and makes it easier to give more specific
error messages.
