import mmap
import os

f = os.open('/dev/mem', os.O_RDWR | os.O_SYNC)
mv = memoryview(mmap.mmap(f, 4096, prot=mmap.PROT_READ|mmap.PROT_WRITE, flags=mmap.MAP_SHARED, offset=0xFF706000))
mvi = mv.cast('I')

mvi[4] = 0x11223344
print(hex(mvi[5]))