🌐 Mailman 3 January 2009 - Python-list - python.org

Re: Python training in Colorado, January 27-30
by lutz＠rmi.net Jan. 5, 2009

Jan. 5, 2009

Yes, my public classes are held only in Colorado today. Most students travel from out-of-town to attend. Per my web page, my classes may be available in a different location later this year (Florida is a strong possibility), but not in Tulsa, unfortunately. Thanks, --Mark Lutz -----Original Message----- >From: alex goretoy <aleksandr.goretoy(a)gmail.com> >Sent: Jan 4, 2009 1:19 PM >To: Mark Lutz <lutz(a)rmi.net> >Cc: python-list(a)python.org >Subject: Re: Python training in Colorado, January 27-30 > >I'd be interested in attending if you make it to Tulsa,OK. Are your courses >only in Colorado? > >-Alex Goretoy >http://www.alexgoretoy.com > > >On Sun, Jan 4, 2009 at 7:29 PM, Mark Lutz <lutz(a)rmi.net> wrote: > >> Python author and trainer Mark Lutz will be teaching a 4-day >> Python class on January 27-30, in Longmont, Colorado. >> >> This is a public training session open to individual enrollments, >> and covers the same topics and hands-on lab work as the onsite >> sessions that Mark teaches. The class provides an in-depth >> introduction to both Python and its common applications, and >> parallels the instructor's popular Python books. >> >> For more information on this session, please visit its web page: >> >> http://home.earthlink.net/~python-training/2009-public-classes.htm<http://home.earthlink.net/%7Epython-training/2009-public-classes.htm> >> >> For additional background on the class itself, see our home page: >> >> http://home.earthlink.net/~python-training<http://home.earthlink.net/%7Epython-training> >> >> Thanks for your interest, >> --Python Training Services >> -- >> http://mail.python.org/mailman/listinfo/python-list >>

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Re: __init__.py and package help
by TechieInsights Jan. 5, 2009

Jan. 5, 2009

Thanks J. Cliff Dyer wrote: > On Mon, 2009-01-05 at 11:49 -0800, TechieInsights wrote: > > Ok I have read all of the tutorials and documents I could find. I am > > running Python 2.6 on windows. The problem I am having with packages > > is that they don't show up! > > > > Simple example of what isn't working... > > Structure- > > > > pytest/ Root directory of package > > __init__.py- code: __all__ = ['folder'] > > folder/ Another folder in the package > > __init__.py- code: __all__ = ['hello'] > > hello.py- code: print('Hello World') > > > > Then I append the path to sys.path, and try and import... > > > > >>> sys.path.append(r'E:\dev\test\pytest') > > >>> from pytest.folder import hello > > Traceback (most recent call last): > > File "<stdin>", line 1, in <module> > > ImportError: No module named pytest.folder > > > > What am I doing wrong! It's driving me crazy. > > Thanks in advance, > > Greg > > You want > > >>> sys.path.append(r'E:\dev\test') > > unless your code is in E:\dev\test\pytest\pytest\folder\hello.py > > > > -- > > http://mail.python.org/mailman/listinfo/python-list > >

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__init__.py and package help
by TechieInsights Jan. 5, 2009

Jan. 5, 2009

Ok I have read all of the tutorials and documents I could find. I am running Python 2.6 on windows. The problem I am having with packages is that they don't show up! Simple example of what isn't working... Structure- pytest/ Root directory of package __init__.py- code: __all__ = ['folder'] folder/ Another folder in the package __init__.py- code: __all__ = ['hello'] hello.py- code: print('Hello World') Then I append the path to sys.path, and try and import... >>> sys.path.append(r'E:\dev\test\pytest') >>> from pytest.folder import hello Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named pytest.folder What am I doing wrong! It's driving me crazy. Thanks in advance, Greg

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Re: why cannot assign to function call
by Grant Edwards Jan. 5, 2009

Jan. 5, 2009

On 2009-01-05, Derek Martin <code(a)pizzashack.org> wrote: > On Sat, Jan 03, 2009 at 11:38:46AM -0600, Grant Edwards wrote: >> > Or are they also "BIZARRE"!? >> >> One presumes that Mr. Martin finds anything different from his >> first computer language to be BIZARRE. He should try out >> Prolog or something genuinely different. > > One's presumption would be mistaken. However thank you for > illustrating my point so precisely, which was after all the > condescending and insulting way people "communicate" with > people whom (they think) know less than they do in this forum, > and not actually how difficult or easy the assignment model of > Python is to understand. I'm sorry, but I really don't see how Python's assignment model could be considered bizarre by anybody who's familiar with more than one or two languages. It's actually somewhat common outside the world of FORTRAN/assembly/C/Pascal. The only thing about Python that ever struck me as odd was the semantic significance of whitespace (and that's not without precedents either). The significance of white-space changed very quickly from odd to brilliant. Among the languages I've known, Python is probably in the bottom 10% as far as bizarrness goes. Lisp/Scheme, Prolog, SNOBOL, COBOL, APL, Forth, Smalltalk and several now-forgotton almost-purely-functional languages all seemed to me orders of magnitude more bizarre than Python. I must admit that a some of those languages (e.g. Forth and Smalltalk) probably felt more "bizarre" due to their developement environment than due to the language itself. And then there is C++ which is bizarre only in the extent to which it's a complete dog's-breakfast. Back to work... -- Grant

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Re: Why not Ruby?
by r Jan. 5, 2009

Jan. 5, 2009

On Jan 5, 7:31 am, "Tim Rowe" <digi...(a)gmail.com> wrote: > 2009/1/1 r <rt8...(a)gmail.com>: > > > I am beginning to think > > the perfect high level language would take the best for Ruby and > > Python. The ultimate language with speed in mind, pythons clear > > syntax, but with shortcuts for gurus. > > I spent quite a few evenings looking at Ruby, and didn't find a single > thing I liked (and I certainly didn't find it "elegant", as the > original poster described it). What do you see in it that you think > would be good in Python? Remember, put in too many shortcuts and > you'll end up with code that's as unmaintainable as Perl! > > -- > Tim Rowe Hello Tim, I think mainly i was just talking out of my bum. I am forced to learn Ruby because it is the only API available for one of my favorite applications. I lament every day that Python was not chosen for the API, not only for myself, but for the poor users who must deal with Ruby's backward way of doing things. I really think Python is the best high level language available today and teaches it's users more than meets-the-eye. I quite enjoy writing Python code, and learned the language very quickly despite the fact that i had no prior programming experience, and very little computer experience in general -- indecently Ruby was the first high level language i tried :) There were a few things initially that i -thought- i liked better about Ruby, but after much consideration, have decided they are not better, and are actually complete rubbish. If i had a choice i would much rather invest my time learning Perl than Ruby. I -will- never get over the use of "end", especially since indentation is allowed. In a language that is as "supposedly" high level as Ruby, this is moronic- monkey-drivel. This complete ludicrisness, coupled with archaic thought processes, is completely redundant, bombastically asinine, and morbidly irreprehensible. Which in turn evaluates to this plague of human excrement we must plow through each and every day! I could could go on and on for hours bashing Ruby, but i should probably stop here before somebody gets upset although i am sure that i will be viciously lambasted for what i have already said.(Pssft-- some people around here are quite touchy!) So let the tongue lashings begin!

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Python callback functions and static methods
by Joris Jan. 5, 2009

Jan. 5, 2009

Hello, I'm trying to implement callback functionality in a static class. I have a feeling that I'm doing something against the Python philosophy and not some programming error but any help would be appreciated. First, a piece of proof-of-concept-code: * class Data: callfunc = None @staticmethod def setCallBack(callfunc): Data.callfunc = callfunc @staticmethod def OnData(data): Data.callfunc(data) def DataCallback(a): print 'I received some data: '+ a Data.setCallBack(DataCallback) Data.OnData('I have new data') * I have defined a class called Data, which I want to use as a "static" class (i.e. I will never create an instance of it). (I come from a Java background so forgive me calling this static) It contains a class variable and 2 static methods. I also defined a separate function called DataCallback, which would just print the data it receives. The goal of this is to use the Data class as a dispatcher of some chunk of data to whatever function I would like, settable at run-time. When executing this script, following error occurs: *Traceback (most recent call last): File "callback.py", line 17, in <module> Data.OnData('I have new data') File "callback.py", line 11, in OnData Data.callfunc(data) TypeError: unbound method DataCallback() must be called with Data instance as first argument (got str instance instead) * What I don't understand is why Python is expecting me to call the DataCallback() function with a Data instance. To my understanding, the DataCallback() function can be called from a static method and thus does not require any instance. Can anyone point me in the right direction ? Thanks, Joris

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Re: socket send help
by Bryan Olson Jan. 5, 2009

Jan. 5, 2009

Gabriel Genellina wrote: > greywine(a)gmail.com escribió: [...] >> A simple server: >> >> from socket import * >> myHost = '' > > Try with myHost = '127.0.0.1' instead - a firewall might be blocking > your server. Just a nit: I'd say the reason to use '127.0.0.1' instead of the empty string is that a firewall might *not* be blocking your server. The Python sockets module interprets the empty string as INADDR_ANY, which means to bind to all available adapters including the loopback, A.K.A localhost, A.K.A '127.0.0.1'. -- --Bryan

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Python return values
by koranthala＠gmail.com Jan. 5, 2009

Jan. 5, 2009

I have a newbie doubt about Python return values. In (say) C/C++, if we try to return a value which is stored inside the procedure stack, we will get an error when trying to access it outside of that procedure. For example: function foo(): dcl y int dcl x pointer to int pointing to y return x function bar(): x = foo() ... use x This will error out since the memory has be taken back. Now, in Python, we do it everytime, because all variables are references, and even returns just copies the references. function pyfoo(): return 786 function pyfoo1(): x = xclass() return x function pybar(): x = pyfoo() y = pyfoo1() ... use x, y Why doesnt it error out?

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My last working day of 2007
by Jack.Chu Jan. 5, 2009

Jan. 5, 2009

Hello guys: I created a simple tool to count how I wasted my time day by day ;-) http://www.flickr.com/photos/34017270@N07/3169438647/sizes/o/ It's simple, a small program running on background, logging the title of foreground window. A python script parses the log file and then generates chart by matplotlib. I just want to get suggestions to improve it, or know the news that somebody had implemented a better one so I can abandon my toy. thanks.

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Re: Tkinter - problem closing window
by Peter Otten Jan. 5, 2009

Jan. 5, 2009

Djames Suhanko wrote: > Hello! > I'm sorry my terrible english (my native language is portuguese). > I has a litle program that open another window. When I close de root > window in quit button, I need clicking 2 times to close. is where the > problem? > > The source: > 1 #!/usr/bin/env python > 2 from Tkinter import * > 3 import sys > 4 import random > 5 class App: > 6 def __init__(self, master): > 7 frame = Frame(master) > 8 frame.pack() > 9 rotulo = Label(frame, text="Clique em 'Gerar' e boa > sorte!",borderwidth=2,bg="gray",justify=C ENTER,relief=SUNKEN) > 10 rotulo.pack() > 11 > 12 self.button = Button(frame, text="Sair", fg="red", > command=frame.quit,borderwidth=1) > 13 self.button.pack(side=LEFT) > 14 self.hi_there = Button(frame, text="Gerar Numero", > command=self.say_hi,borderwidth=1) > 15 self.hi_there.pack(side=RIGHT,padx=2,pady=2) > 16 > 17 def gera_seis(self): > 18 a = {} > 19 for i in range(6): > 20 a[i] = "%02d" % int (random.randint(0,60)) > 21 resultadoA = "%s-%s-%s-%s-%s-%s" % > (str(a[0]),str(a[1]),str(a[2]),str(a[3]),str(a[4]),str(a[5])) > 22 return resultadoA > 23 > 24 def say_hi(self): > 25 resultado = self.gera_seis() > 26 raiz = Tk() > 27 F = Frame(raiz) > 28 F.pack() > 29 hello = Label(F, text=resultado) > 30 hello.pack() > 31 F.mainloop() You need only one mainloop(). Remove line 31 and you should be OK. > 32 > 33 root = Tk() > 34 root.title("$$$ Loteria $$$") > 35 app = App(root) > 36 root.mainloop() Peter

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