Authors: |
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SimPy version: | 1.8 |
SimPy Web-site: | |
SimPy wiki: | |
Python-Version: | 2.3+ |
Revision: | $Revision: 1.1.1.7 $ |
Date: | $Date: 2007/01/09 18:54:35 $ |
SimPy is based on ideas from Simula and Simscript but uses standard Python. It combines two previous packages, SiPy, in Simula-Style (Dr. Klaus Muller) and SimPy, in Simscript style (Tony.Vignaux and Chang Chui)
SimPy is based on efficient implementation of co-routines using Python's generators capability.
The package has been hosted on Sourceforge.net since 15 September 2002. Sourceforge.net's service has always outstanding. It is essential to the SimPy project!
This is a major release with added functionality/new user API calls and bug fixes.
This is a maintenance release. The API has not been changed/added to.
This is a major release.
This is a minor release.
MAJOR LICENSE CHANGE:
Starting with this version 1.5.1, SimPy is being release under the GNU Lesser General Public License (LGPL), instead of the GNU GPL. This change has been made to encourage commercial firms to use SimPy in for-profit work.
Minor re-release
No additional/changed functionality
Includes unit test file'MonitorTest.py' which had been accidentally deleted from 1.5
Provides updated version of 'Bank.html' tutorial.
Provides an additional tutorial ('Bank2.html') which shows how to use the new synchronization constructs introduced in SimPy 1.5.
More logical, cleaner version numbering in files.
New functionality/API additions
- SimEvents and signalling synchronization constructs, with 'yield waitevent' and 'yield queueevent' commands.
- A general "wait until" synchronization construct, with the 'yield waituntil' command.
No changes to 1.4.x API, i.e., existing code will work as before.
Sub-release to repair two bugs:
- The unittest for monitored Resource queues does not fail anymore.
- SimulationTrace now works correctly with "yield hold,self" form.
No functional or API changes
Sub-release to repair two bugs:
- The (optional) monitoring of the activeQ in Resource now works correctly.
- The "cellphone.py" example is now implemented correctly.
No functional or API changes
New functionality/API changes
- All classes in the SimPy API are now new style classes, i.e., they inherit from object either directly or indirectly.
- 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.
- Some Monitor methods/attributes have changed. See Manual!
- Monitor now inherits from list.
- A class Histogram has been added to Simulation.py and all SimulationXXX.py modules.
- A module SimulationRT has been added which allows synchronization between simulated and wallclock time.
- A moduleSimulationStep which allows the execution of a simulation model event-by-event, with the facility to execute application code after each event.
- A Tk/Tkinter-based module SimGUI has been added which provides a SimPy GUI framework.
- A Tk/Tkinter-based module SimPlot has been added which provides for plot output from SimPy programs.
Significantly improved performance
Significant increase in number of quasi-parallel processes SimPy can handle
New functionality/API changes:
- Addition of SimulationTrace, an event trace utility
- Addition of Lister, a prettyprinter for instance attributes
- No API changes
Internal changes:
- Implementation of a proposal by Simon Frost: storing the keys of the event set dictionary in a binary search tree using bisect. Thank you, Simon! SimPy 1.3 is dedicated to you!
Update of Manual to address tracing.
Update of Interfacing doc to address output visualization using Scientific Python gplt package.
No changes in API.
Version 0.5 Beta-release, intended to get testing by application developers and system integrators in preparation of first full (production) release. Released on SourceForge.net on 20 October 2002.
More models
Documentation enhanced by a manual, a tutorial ("The Bank") and installation instructions.
Major changes to the API:
Introduced 'simulate(until=0)' instead of 'scheduler(till=0)'. Left 'scheduler()' in for backward compatibility, but marked as deprecated.
Added attribute "name" to class Process. Process constructor is now:
def __init__(self,name="a_process")
Backward compatible if keyword parameters used.
Changed Resource constructor to:
def __init__(self,capacity=1,name="a_resource",unitName="units")
Backward compatible if keyword parameters used.