\frametitle {SAGE Demo:  Interfaces}
{\dred HOW IT WORKS:} Use buffered psuedo-tty's and Python objects that wrap native objects.  This makes
it possible to wrap {\dred all} math software
that has a command line interface using very similar code.

\vfill
\begin{verbatim}
sage: x = singular('2+3')
\end{verbatim}
This fires up one copy of Singular (if it wasn't already started)
and sends the line {\tt '2+3'} to Singular.
It also creates a Python class R with a field set to {\tt "sage0"}.
{\small \begin{verbatim}
sha:~ was$ ps ax |grep Singular
21664  pe  Ss+    0:00.01 /bin/sh /Volumes/HOME/s/local/bin/Singular -t --ticks
21666  pe  S+     0:00.06 Singular-3-0-2 -t --ticks-per-sec 1000
sage: type(x)
<class 'sage.interfaces.singular.SingularElement'>
sage: x
5
sage: R.name()
'sage0'
\end{verbatim}
}