Python mmap 'Permission denied' on Linux

Question

I have a really large file I\'m trying to open with mmap and its giving me permission denied. I\'ve tried different flags and modes to the os.open but its just not

Answer 1

The cross-platform call of mmap can be performed using access parameter:

mfd = os.open('BigFile', os.O_RDONLY)
mm = mmap.mmap(mfd, 0, access=mmap.ACCESS_READ)

The mmap construction permissions should be synced with the file open permissions (both read, write, or read/write).