SimPy (Simulation in Python) is a process-based discrete event simulation package. This new version of SimPy has significantly more capabilities than version 1.3. They have been developed from the ideas and with great collaboration of the very active SimPy user and developer communities Get SimPy 1.4 from http://sourceforge.net/projects/simpy/ and enjoy! Read more on SimPy at simpy.sourceforge.net. Here are the major changes and additions in SimPy 1.4: SimulationRT ------------ - A module which allows synchronization between simulated and wallclock time. SimulationStep -------------- - A module which allows the execution of a simulation model event-by-event, with the facility to execute application code after each event. SimGUI ------ - A Tk/Tkinter-based module which provides a SimPy GUI framework. SimPlot ------- - A Tk/Tkinter-based module which provides for plot output from SimPy programs. Resources ---------- - The wait queue and active servers of Resource objects can be Monitored for simulation data collection Monitor ------- - Module *Monitor.py* has been merged into module *Simulation.py* and all *SimulationXXX.py* modules. Import of *Simulation* or any *SimulationXXX* module now also imports *Monitor*. - *Monitor* now inherits from *list*. New style classes ----------------- - All classes in the SimPy API are now new style classes, i.e., they inherit from *object* either directly or indirectly. Histogram --------- - A class *Histogram* has been added to *Simulation.py* and all *SimulationXXX.py* modules.