%T PyCSP Revisited
%A  Brian Vinter,  John Markus Bjørndalen,  Rune Møllegard Friborg
%E Peter H. Welch,  Herman Roebbers,  Jan F. Broenink,  Frederick R. M. Barnes,  Carl G. Ritson,  Adam T. Sampson,  G. S. Stiles,  Brian Vinter
%B Communicating Process Architectures 2009
%X PyCSP was introduced two years ago and has since been used
   by a number
of programmers, especially students. The
   original motivation behind
PyCSP was a conviction that both
   Python and CSP are tools that are
especially well suited for
   programmers and scientists in other fields
than computer
   science.  Working under this premise the original PyCSP
was
   very similar to JCSP and the motivation was simply to
   provide CSP
to the Python community in the JCSP tradition.
   After two years we have
concluded that PyCSP is indeed a
   usable tool for the target users;
however many of them have
   raised some of the same issues with PyCSP as
with JCSP. The
   many channel types, lack of output guards and
   external
choice wrapped in the select\-then\-execute
   mechanism were frequent
complaints. In this work we revisit
   PyCSP and address the issues that
have been raised. The
   result is a much simpler PyCSP with only one
channel type,
   support for output guards, and external choice that
   is
closer to that of occam than JCSP.