file.write[lines]() weirdness

[Martin v. Löwis]

netzapper at magicstar.net (A. Jones) writes:

> Any insight would be much appreciated.

Seeking and text mode does not really mix well. When you write to a
text file, the C library may expand or collapse newline characters,
and perform other modifications. So if you write n bytes to a text
file, that doesn't mean that n bytes end on disk.

I recommend to open the file in binary.

Regards,
Martin