Stackless Python 2.5 for Nintendo DS
Hi, I have updated NDS Python from Python 2.4.3 to Python 2.5 (or rather the Stackless version of it). You can read more about it here if it might interest you: http://www.disinterest.org/NDS/Python25.html Cheers, Richard. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to save a running program and reload next time ?
[EMAIL PROTECTED] wrote: I have a program which will continue to run for several days. When it is running, I can't do anything except waiting because it takes over most of the CUP time. Is it possible that the program can save all running data to a file when I want it to stop, and can reload the data and continue to run from where it stops when the computer is free ? Yes. Stackless Python can allow you to pickle running code and to save it to disk and load it and continue running it from where it left off. It won't of course work if there is external state because this will not be there, or necessarily still be relevant when the code resumes. So as long as you know the limitations and they suit your uses, it should be usable for this. http://www.stackless.com Here's an example: import stackless import cPickle import time def f(): n = 0 while True: n += 1 stackless.schedule() t = stackless.tasklet(f)() while True: # Run the tasklet until it yields or dies. t.run() # Yield to the operating system. try: time.sleep(0.1) except KeyboardInterrupt: if not t.alive: print Tasklet unexpectedly dead break # Serialise the running tasklet. v = cPickle.dumps(t) # Kill the old version. t.kill() # y / enter = continue # anything else = exit # otherwise stalled s = raw_input(Continue? [y]:).lower() if s not in (y, ): break t = cPickle.loads(v) Unfortunately KeyboardInterrupt or probably any other exception as a way of interrupting the running code is problematic as it will kill the running tasklet if it happens there instead of during the sleep. Hope this helps, Richard. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python on Nintendo DS
You can find the new port of Python 2.4.3 (Stackless) here: http://www.disinterest.org/NDS/Python24.html Even if you do not have a Nintendo DS with the appropriate homebrewing device to make the rom available to it, you should still be able to run it within an emulator like Dualis (which is where the screenshot is taken). Any comments are welcome :) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python on Nintendo DS
An update to my Python on Nintendo DS efforts. Summary: - Working bug free port of Python for the Nintendo DS. - Programmers wanted to help write extensions to expose the DS hardware to Python. - Stackless Python supported, but not bug free. When I last worked on it, it had several remaining bugs including a broken zipimport, unreliability due to limited stack space and more. I spent a statutory holiday on it and located and fixed all the bugs, including the allocation of stack space and the problems with zipimport (due to a misunderstanding about what seek function API I should respect). As it stands now, it seems pretty bug free. Python itself running on the Nintendo DS with no access to the hardware features (graphics, microphone, speakers, touchscreen) is not much use. As a text-based calculator it serves one purpose I guess. But to really serve as a useful tool on the DS, it needs to expose these pieces of hardware. SDL is one option, as there is a reportedly buggy port of SDL for the DS, and ideally as PyGame is based on SDL, a port of that would hopefully be straightforward. If anyone has an experience writing extension modules in C, and with programming the DS hardware in C, and wishes to help flesh out some form of library codebase to make this a useful port of Python, please let me know! :) Also, I switched to the Stackless Python code base. The tasklet scheduler locks up if invoked, but I haven't had the chance to look into this yet. But given that tasklets run and switch in the limited scenarios I have tried, fixing the scheduler should be a matter of time. Richard -- http://mail.python.org/mailman/listinfo/python-list
Stackless Python for 2.4.3
Hi, Stackless Python is now available for the recent release of Python 2.4.3 (final). You can either obtain the source code from the SVN repository or download the precompiled windows binaries. SVN:http://codespeak.net/svn/stackless/Python-2.4.3/dev Download: http://www.stackless.com/download If anyone plans to download and compile the source, there are however some minor things that need to be taken into account which you may be able to help me with, if you have the time. 1. I need a generated 'configure' file. I believe the 'configure.in' fine should be fine, but if someone could run autoconf and send me the result so I can check it in, it would be appreciated. It would be best if anyone planning to do this checked the Stackless mailing list to see if there was any mention of someone else already having taken care of it. 2. Having the Python tests run, and the Stackless unittests run by various people on different platforms would give a better indication of the state of the port. The following instructions are of course Win32 specific, but they should be translate easily. a) Retrieve the 2.4.3 source code from SVN at: http://codespeak.net/svn/stackless/Python-2.4.3/dev b) Compile it. c) Open a console in the 'Stackless\unittests' directory. Type '..\..\PCBuild\python.exe run_all.py'. The expected result is that one pickling test will fail, this is ok and it is the same known bug that we had for 2.4.2, which should be easy enough to fix if someone wants to step forward and put in the time and effort. d) Open a console in the top level of the source code. Type 'PCBuild\python.exe Lib\test\regrtest.py' The expected result is that there will be a lot of skipped tests, and possibly some failures depending on your platform. I had these fail: - test_email - test_winsound Neither of the errors were necessarily Stackless related, but it is possible they are. But if you see any for your build that are unexpected, please mention them. Thanks, Richard Tew. -- http://mail.python.org/mailman/listinfo/python-list
Re: Stackless Python for 2.4.3
I would just like to clarify, the windows specific paths do not imply that Stackless compiles only on Windows, or that the tests being run on Windows is all I am interested in. Stackless compiles on a range of non-Windows platforms, including x86 linux, mac os and others. And knowing the port works on them all and is therefore more or less complete except for known issues is what I am interesting in learning. Or what has to be fixed. Thanks, Richard. -- http://mail.python.org/mailman/listinfo/python-list
Re: RPC client class?
From Dick Watson: We have a legacy device that exposes an RPC server. We have an RPCL defininition of its interface. We want to develop an RPC client of this interface in Python that will be usable in both Win32 and open systems environments. I can find some *very* dated references to a demo/rpc.py, but I can't find such a file on my Win Python install. There is an rpc.py in idle, but it doesn't seem to be a general purpose implementation. (I can find **lots** of references to xmlrpc.py, but the server predates all of this neato XML stuff. I also found the Stackless rpc.py; it wants to modify base Python. I'd rather not diverge from the stock Python.) The stackless rpc.py is also not an implementation of Sun RPC. It just uses Stackless tasklets to enable direct Python function function calls from server to client and vice versa. Perhaps it was bad naming on my part, but I assumed remote procedure calls was a general technique rather than just a Sun RPC protocol. Richard. -- http://mail.python.org/mailman/listinfo/python-list
Stackless Python sprint at PyCon 2006
There is a Stackless Python sprint planned for PyCon 2006 during the days of the 27th of February to the 2nd of March (the post-conference sprint period). The goal is to update Stackless making it more current and approachable. We are planning to port it to the latest version of Python. But anyone who has an interest in Stackless is welcome to come along and help out in any way that appeals to you. You can read more about the sprint and the talk about how Stackless is used in the massively multiplayer game EVE Online at PyCon here: http://www.stackless.com/Members/rmtew/pycon2006 Or browse the following web site to get more information about Stackless: http://www.stackless.com/ Richard. -- http://mail.python.org/mailman/listinfo/python-list
