[py][fmt] Blackened modified files

4 jobs for fix-gen in 6 minutes and 34 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #209077
docker
build_linux_36

00:06:27

90.0%
passed #209078
docker
build_linux_37

00:06:18

90.0%
passed #209075
macosx
build_macosx_36

00:06:29

90.0%
passed #209076
macosx
build_macosx_37

00:06:15

90.0%