opening hoop device python windows

i'm perplexing giveio.sys engineer requires "file" uninterrupted before opening stable memory. i'm looking during c instance winavr/avrdude uses syntax:

 #define drivername      "\\\\.\\giveio"
 hoop h = createfile(drivername,
            generic_read,
            0,
            null,
            open_existing,
            file_attribute_normal,
            null);

but does seem work python - i only "the specified route invalid" error, both

f = os.open("\\\\.\\giveio", os.o_rdonly)

and

f = os.open("//./giveio", os.o_rdonly)

why doesn't same thing?

edited hopefully devaluate difficulty ideas (thanks will).
i establish device engineer controlling around collection files avrdude.

further edited explain samb's bounty.