tried a bunch of other more sophisticated ways to do this in snarfed/webutil@280a93e092 (plus snarfed/webutil@6cb9c1f719), tried a custom repeated property class that acted like a set instead of a list, but couldn't get it to work reliably or compatibly enough.
remaining:
$ flake8 --extend-ignore=E501 *.py tests/*.py
"pyflakes" failed during execution due to "'FlakesChecker' object has no attribute 'NAMEDEXPR'"
Run flake8 with greater verbosity to see more details
activitypub.py:15:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
activitypub.py:36:1: F401 'web' imported but unused
activitypub.py:48:1: E302 expected 2 blank lines, found 1
activitypub.py:51:9: F811 redefinition of unused 'web' from line 36
app.py:6:1: F401 'flask_app.app' imported but unused
app.py:9:1: F401 'activitypub' imported but unused
app.py:9:1: F401 'convert' imported but unused
app.py:9:1: F401 'follow' imported but unused
app.py:9:1: F401 'pages' imported but unused
app.py:9:1: F401 'redirect' imported but unused
app.py:9:1: F401 'superfeedr' imported but unused
app.py:9:1: F401 'ui' imported but unused
app.py:9:1: F401 'webfinger' imported but unused
app.py:9:1: F401 'web' imported but unused
app.py:9:1: F401 'xrpc_actor' imported but unused
app.py:9:1: F401 'xrpc_feed' imported but unused
app.py:9:1: F401 'xrpc_graph' imported but unused
app.py:9:19: E401 multiple imports on one line
models.py:19:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
models.py:364:31: E114 indentation is not a multiple of four (comment)
models.py:364:31: E116 unexpected indentation (comment)
protocol.py:17:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
redirect.py:26:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
web.py:18:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
webfinger.py:13:1: F401 'oauth_dropins.webutil.util.json_loads' imported but unused
webfinger.py:110:13: E122 continuation line missing indentation or outdented
webfinger.py:111:13: E122 continuation line missing indentation or outdented
webfinger.py:131:13: E122 continuation line missing indentation or outdented
webfinger.py:132:13: E122 continuation line missing indentation or outdented
webfinger.py:133:13: E122 continuation line missing indentation or outdented
webfinger.py:134:13: E122 continuation line missing indentation or outdented
tests/__init__.py:2:1: F401 'oauth_dropins.webutil.tests' imported but unused
tests/test_follow.py:11:1: F401 'oauth_dropins.webutil.util.json_dumps' imported but unused
tests/test_follow.py:14:1: F401 '.testutil.Fake' imported but unused
tests/test_models.py:156:15: E122 continuation line missing indentation or outdented
tests/test_models.py:157:15: E122 continuation line missing indentation or outdented
tests/test_models.py:158:11: E122 continuation line missing indentation or outdented
tests/test_web.py:12:1: F401 'oauth_dropins.webutil.util.json_dumps' imported but unused
tests/test_web.py:17:1: F401 '.testutil' imported but unused
tests/test_web.py:1513:13: E128 continuation line under-indented for visual indent
tests/test_web.py:1514:9: E124 closing bracket does not match visual indentation
tests/testutil.py:106:1: E402 module level import not at top of file
tests/testutil.py:107:1: E402 module level import not at top of file
tests/testutil.py:108:1: E402 module level import not at top of file
tests/testutil.py:109:1: E402 module level import not at top of file
tests/testutil.py:110:1: E402 module level import not at top of file
tests/testutil.py:301:24: E203 whitespace before ':'
tests/testutil.py:301:25: E701 multiple statements on one line (colon)
tests/testutil.py:301:25: E231 missing whitespace after ':'
also for AP => wm, only try to send webmentions to domains that we already have an existing Web user for. the vast majority of targets are fediverse URLs, and we were trying to send them all wms, ie at least running wm discovery and finding nothing. harmless, but a waste.
also change Web.fetch() to allow missing mf2 instead of raising exception. we now create Web users with None for mf2 property if the site has no mf2.
for #512
Ryan Barrett