Re: notify.py

Federico Di Gregorio wrote:
> Il giorno ven, 17/03/2006 alle 13.07 -0600, Michael Hipp ha scritto:
> > I'm trying to refactor some of my code to use the "new" method of doing 
> > a LISTEN on the database, I'm stuck on this key piece of code:
> >
> > print "Waiting for 'NOTIFY test'"
> > while 1:
> >      if select.select([curs],[],[],5)==([],[],[]):
> >          print "Timeout"
> >      else:
> >          if curs.isready():
> >              print "Got NOTIFY: %s" % str(curs.connection.notifies.pop())
> >
> >
> > I understand the 'select' part.
> >
> > What does curs.isready() do? What happens if it comes back as not True?
>
> It just means that the current data transfer from the backend is still
> in progress. But given the fact that only the Really Brave (TM) would
> use psycopg async calls right now it will never happen to you (but you
> must still call .isready() because it will gather the pending notifies.)

Thank you.

In production code, would it be generally advisable to put a try/except block 
around the curs.isready() and curs.connection.notifies() ?

Thanks,
Michael