Midi output timing?

[Tobiah]

I'd like to use a python program to send out MIDI events
to another program.  I've done in the past by generating scores
for csound which would do the MIDI output.  

The apparent hurdle is the timing bit.  I've seen packages that
allow the creation of MIDI events, but given a list of events
of arbitrary start time, how can I schedule the triggering of
each event?  Csound runs in sync with the audio device output which
is desirable if not necessary. 


Thanks