🌐 Mailman 3 January 2002 - Python-list - python.org

Panda3d
by John DeWeese Jan. 31, 2002

Jan. 31, 2002

Hello, haven't seen any posts on this, so I'm sending out a ripple. I've discovered Disney's Panda3d, a collection of software for interactive graphical sims (games, etc.) that is driven top down by Python. The project is in active development on sourceforge (www.sourceforge.net/projects/panda3d - CVS access only), runs on a variety of platforms (most anything that supports C++, Python, and OpenGL) and is stable enough that it is used as the basis for many games in Disney's theme parks. A developer dynamically codes up their application and game logic in Python and uses the included language bridge tools to manipulate C++ optimized objects that manage the 3d simulation, graphics, sound, and input. Sounds pretty sweet. Experiences? Opinions? Enjoy - John

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Re: Defending the Python lanuage...
by rony.steelandt＠bucodi.com Jan. 31, 2002

Jan. 31, 2002

Cliff Wells <logiplexsoftware(a)earthlink.net> wrote in message news:<mailman.1012413771.6220.python-list(a)python.org>... Thank you, this was a very answer Rony

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Re: Elegant solution needed: Data manipulation
by Scott David Daniels Jan. 31, 2002

Jan. 31, 2002

On Wed, 30 Jan 2002 19:42:24 -0600, "Jason Orendorff" <jason(a)jorendorff.com> wrote: > Mark wrote: > ... lots of great suff... > > # Step 1. Build your data structure out of objects. > class DataRow: > def __init__(self, height, weight, speed): > self.height = height > self.weight = weight > self.speed = speed I'd replace this with the following more general piece: class Data: def __init__(self, **kwargs): self.__dict__.update(kwargs) def __repr__(self): return ''.join(( self.__class__.__name__, '(', ', '.join(['%s=%r' % entry for entry in vars(self).items()]), ')')) > # You can write the part the reads it out of a file. > # Here is what the resulting data structure should be. > data = [ DataRow(3, 6, 12), > DataRow(5, 9, 20), > DataRow(4, 10, 15) ] In which case you'll need this to be: data = [ Data(height=3, width=6, speed=12), Data(height=5, width=9, speed=20), Data(height=4, width=10, speed=15) ] and everything else works the same way. The nice thing about this class is (1) it expands to whatever types you like, and (2) it prints nicely. -Scott -Scott

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Proof that Python is for Real Programmers (named Mel?)
by Keith Farmer Jan. 31, 2002

Jan. 31, 2002

http://mindprod.com/unmain.html >From (32): " If a maintenance programmer can't quote entire Monty Python movies from memory, he or she has no business being a programmer. " ---------- Keith J. Farmer kfarmer(a)thuban.org http://www.thuban.org

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Exception handling and traceback from Python/C API
by martin.segersten＠front.com Jan. 31, 2002

Jan. 31, 2002

Hi! I'm trying to get a traceback with help of the function PyErr_Fetch. It is, to be more specific, the third argument that I'm trying to get hold of. I can't find any easy way to do that so could any one please help me. Please look at the code-example, at the end of this text, from 1997/08/15, in this group. It gives a good example on how to use PyErr_Fetch despite of that it do not explain how get the traceback. Regards /Martin include <Python.h> #include <stdio.h> char save_error_type[1024], save_error_info[1024]; PyerrorHandler(char *msgFromC) { /* process Python-related errors */ /* call after Python API raises an exception C detects */ PyObject *errobj, *errdata, *errtraceback, *pystring; printf("%s\n", msgFromC); /* get latest python exception info */ PyErr_Fetch(&errobj, &errdata, &errtraceback); /* increfs all 3 */ pystring = NULL; if (errobj != NULL && (pystring = PyObject_Str(errobj)) != NULL && /* str(errobj) */ (PyString_Check(pystring)) /* str(): increfs */ ) strcpy(save_error_type, PyString_AsString(pystring)); /* Py->C */ else strcpy(save_error_type, "<unknown exception type>"); Py_XDECREF(pystring); pystring = NULL; if (errdata != NULL && (pystring = PyObject_Str(errdata)) != NULL && /* str(): increfs */ (PyString_Check(pystring)) ) strcpy(save_error_info, PyString_AsString(pystring)); /* Py->C */ else strcpy(save_error_info, "<unknown exception data>"); Py_XDECREF(pystring); printf("%s\n%s\n", save_error_type, save_error_info); Py_XDECREF(errobj); Py_XDECREF(errdata); /* caller owns all 3 objects */ Py_XDECREF(errtraceback); /* already NULL'd out in Python */ }

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Re: autocoding project proposal
by Neil Hodgson Jan. 31, 2002

Jan. 31, 2002

dman: > On Wed, Jan 30, 2002 at 08:50:35PM +0000, Neil Hodgson wrote: > | class X: > | def init(self): > | pass > | <<tagReader>> > | def writer(self, f): > | <<tagWriter>> > > If you want to insert more than one LOC, you'll still need to know the > indentation level for the other lines. Can you please give an example? It looks to me as if multiple lines are simply indented relative to the insertion point. Neil

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RE: lists, uppercase?
by Alex Martelli Jan. 31, 2002

Jan. 31, 2002

Brian Quinlan wrote: ... >> how can i get to know if a string is totally uppercase? > >>>> 'ABC'.isupper() > 1 >>>> 'abc'.isupper() > 0 >>>> '123'.isupper() > 0 Just be aware of one anomaly: ''.isupper() is 0. Alex

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Re: autocoding project proposal
by brianr＠liffe.com Jan. 31, 2002

Jan. 31, 2002

"Sean 'Shaleh' Perry" <shalehperry(a)attbi.com> writes: > > I haev looked at it for much smaller, almost one off uses. As you suggest, I > always seem to end up with an 'indentation_level' variable and code doing > something like: > > line = (indentation_level * ' ') + data > > It just always feels more soupy. Being able to say 'int main() { foo; bar; > baz; }' makes machine generated coding go a little easier. But I am sure that > is not for long term projects like yours. Different issues for small scale > versus large scale. Adding the necessary python code for mine always seemed > like overkill. In your case what is 10 or 20 more lines of code in a 100 - > 1000+ line app. > I agree it is easier to generate code if you don't have to worry about indenting, and you don't have to worry about that with languages that that don't care about indentation and have begin and end block markers. I have had to generate plenty of python code myself and I have found that the need to maintain indentation adds complexity to the problem of code generation. My idea to make it easier (and I haven't tried it yet) is to make use of pyindent. That is generate the code using the end block tags that pyindent uses without worrying about indentation, then use pyindent itself to post-process the code and apply the correct indentation. Can anyone suggest any problems with this approach, or was this what a previous poster meant by being not that hard? -- Brian Raven I would estimate that the number of programs it breaks in the world will be less than 10. As long as one of those 10 isn't CGI.pm, we're probably okay. -- Larry Wall in <199804161805.LAA18882(a)wall.org>

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Re: port doubling (or...)?
by Chris Liechti Jan. 31, 2002

Jan. 31, 2002

"maximilianscherr" <MaximilianScherr(a)T-Online.de> wrote in news:mailman.1011648811.4270.python-list@python.org: > thanks, > have > it's a sever emu for uo, and i'm afraid, i can't change the port > (would be easier). the server does not handle all incoming packets, > so: lack of features. but i know the packet descriptions and > formats... so i could add this myself. the server has a sendpacket > command but not a receivepacket loop or something:( so i would need > to be able to accept connections on the same port, and if they are > unknown packets, they are handled by my server script. > like if packet = "BA97..." can you run the server on a diffrent port? you could filter incomming requests on your server running on the original port and just pass along the ones you not interested in to the original server. this could also be done with two machines, without changing ports. > thats what i want to do, i was told it is possible with socket > programming. UPD and TCP protocols have their own numbering you can have a server of each family on the same port number. > but i don't know if that is right for python too:) python is usualy the right choice for anything.... > i'm quite a newbie, so can't imagine how i could listen on one port > with both servers. > > > --- In python-list@y..., "Gillou" <nospam@b...> wrote: >> First condition : your server engine must have 2 distinct IP addrs. >> Second bind sockets of both servers to its own IP addr. >> >> But it's easier to have 2 distincts ports. >> Are the clients unable to change their request port ? >> >> "maximilianscherr" <MaximilianScherr@T...> a écrit dans le message >> news: mailman.1011640472.32099.python-list@p... >> > how can i do port doubling? >> > not sure if it's called like this, but i have server listening on >> > port 5003 and need to have a script listen on the same port. >> > possible? if yes, how? >> > could you give an example? >> > >> > thanks, >> > >> > Max >> > >> > >> >> >> -- >> http://mail.python.org/mailman/listinfo/python-list > > > -- Chris <cliechti(a)gmx.net>

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RE: Autocoding project proposal.
by Timothy Rue Jan. 31, 2002

Jan. 31, 2002

On 29-Jan-02 23:31:45 Delaney, Timothy <tdelaney(a)avaya.com> wrote: >> From: Timothy Rue [mailto:threeseas@earthlink.net] >> >> On 29-Jan-02 11:06:40 David Masterson <dmaster(a)synopsys.com> wrote: >> >>>>>> Timothy Rue writes: >> >> >> On 28-Jan-02 13:26:36 David Masterson <dmaster(a)synopsys.com> wrote: >> >> >>> These are the things you'll need to take into account in >> developing >> >>> a new language (or get others to help you develop it). >> >> >> Well since the VIC is not a language I don't suppose I need be >> >> concerned about such things as the things you presented. >> >> >Of course its a language. As you've already stated, it's a language >> >consisting of 9 commands. >> >> I didn't say that. >> >> [snip] >> >> But this that I'm on about, the definition stays as is, >> though the word or >> symbol sequences attached to the definitions are open to be changed. >OK - I give up too. I've done my best to understand what you're going on >about, but so far as I can tell, everything you say means nothing. Seriously >- I don't think I've read a single thing from you that, once you remove all >the double-talk and nonsense, actually means anything. >I have just added you to my killfile. Any post from you will now be >automatically deleted. >Tim Delaney It's far from uncommon for some to make this sort of claim while not really doing it. In any event one has to wonder what reason is it that you feel you need to announce your choice. If I don't like someones postings, I don't read them. It's called will power. --- *3 S.E.A.S - Virtual Interaction Configuration (VIC) - VISION OF VISIONS!* *~ ~ ~ Advancing How we Perceive and Use the Tool of Computers!* Timothy Rue What's *DONE* in all we do? *AI PK OI IP OP SF IQ ID KE* Email @ mailto:timrue@mindspring.com >INPUT->(Processing)->OUTPUT>v Web @ http://www.mindspring.com/~timrue/ ^<--------<----9----<--------<

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