Buffering control in python?

[jepler at unpythonic.net]

I think that you have to do something like this:
    def reopen(f, mode=None, bufsize=-1):
	if mode is None: mode = f.mode
        fd = f.fileno()
        return os.fdopen(fd, mode, bufsize)
It shouldn't be hard to export an interface to setvbuf(3), I'm not sure why
this doesn't seem to exist.  In that case, it would be much simpler:
    f.setvbuf(0)
I'm not sure why the interface doesn't exist, except that setvbuf doesn't
exist on all systems.

Jeff