[Q] ctypes callbacks with Delphi

[achrist at easystreet.com]

Jimmy Retzlaff wrote:
> 
> 
> The last I heard, pexpect didn't work on Windows, but I'm certainly no
> expert on it. If that still holds then things like XMLRPC and SOAP might
> be options depending on how well they are supported on the Delphi side.
> XMLRPC is almost trivial in Python (see xmlrpclib). 

You're right again. I saw that pexpect didn't work on platforms without
pty, and Windows python has a pty.py module, so I guessed wrong. There
are
some other requirements that are presently absent from the Windows
distro.

I've got it working using the os.popen3 call, which seems very good
for such things.  Since I've got source for both ends of the pipe
connections, I can be sure to flush() the file, and I don't have
any timing problems (at least on Win2k and WinNT).  The data is
always available at the other end of the pipe after a flush() from
the sender.  Anyone know if this works identically on Win85, 98, XP,
2003, etc?

The conversation is just a few 1-byte codes back and forth, so XMLRPC,
etc, is overkill for now.  os.popen3 works dandy, so far, so good.

Al