typing: suppress bogus pytype errors in `mercurial/wireprotoframing.py` This fixes: File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 480, in createalternatelocationresponseframe: unsupported operand type(s) for item assignment: bytes [unsupported-operands] No attribute '__setitem__' on bytes File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 510, in createcommanderrorresponse: unsupported operand type(s) for item assignment: bytes [unsupported-operands] No attribute '__setitem__' on bytes File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 776, in __init__: Can't find module 'mercurial.zstd'. [import-error] File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 804, in __init__: Can't find module 'mercurial.zstd'. [import-error] File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 834, in populatestreamencoders: Can't find module 'mercurial.zstd'. [import-error] Using `TypedDict` is tempting here to fix the first two, but requires str keys. The code doing the importing doesn't call the code at the other three locations if the `mercurial.zstd` module fails to import in a place that handles the ImportError.