I have two open file objects, dest and src. File object dest is opened for writing, with the seek position placed at some offset within th
dest
src
Since version 3.3, Python has os.sendfile, which interfaces to various Unix variants' sendfile(2) zero-copy I/O interfaces. It operates on file descriptors, not general file-like objects. For older Pythons, there's py-sendfile.
sendfile(2)