micropython/tests/extmod/uctypes_byteat.py

try:
    import uctypes
except ImportError:
    print("SKIP")
    raise SystemExit

data = bytearray(b"01234567")

print(uctypes.bytes_at(uctypes.addressof(data), 4))
print(uctypes.bytearray_at(uctypes.addressof(data), 4))