tests / scripts: blacken and isort (#4704)

I often run black and isort in typeshed root and then have to undo these
changes.

Co-authored-by: hauntsaninja <>

.flake8

@@ -14,6 +14,7 @@
 
 [flake8]
 per-file-ignores =
+  *.py: E203, W503
   *.pyi: E301, E302, E305, E501, E701, E741, F401, F403, F405, F822
   # Since typing.pyi defines "overload" this is not recognized by flake8 as typing.overload.
   # Unfortunately, flake8 does not allow to "noqa" just a specific error inside the file itself.