Prefix completions with custom python filter #216

Job	Run time
sdist	2m 25s
cibuildwheel ubuntu-22.04/x86_64/cpython/many	16m 11s
cibuildwheel ubuntu-22.04/x86_64/cpython/musl	16m 0s
cibuildwheel ubuntu-22.04/x86_64/pypy/many	6m 56s
cibuildwheel ubuntu-22.04/arm64/cpython/many	1h 15m 2s
cibuildwheel ubuntu-22.04/arm64/cpython/musl	1h 33m 59s
cibuildwheel ubuntu-22.04/arm64/pypy/many	47m 28s
cibuildwheel macos-12/x86_64/cpython/many	23m 7s
cibuildwheel macos-12/x86_64/pypy/many	14m 26s
cibuildwheel macos-12/arm64/cpython/many	11m 34s
upload_all	0s
	5h 7m 8s

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