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

Class Methods help
by bdsatish June 1, 2009

June 1, 2009

Hi, I have a question regarding the difference b/w "class methods" and "object methods". Consider for example: class MyClass: x = 10 Now I can access MyClass.x -- I want a similar thing for functions. I tried class MyClass: def some_func(x): return x+2 When I call MyClass.some_func(10) -- it fails, with error message: TypeError: unbound method some_func() must be called with MyClass instance as first argument (got int instance instead) OK. I figured out that something like this works: obj = MyClass() y = obj.some_func(10) BUT, this means that we have functions applying for instances. That is we have "instance method". Now, how do I implement some function which I can invoke with the class name itself ? Instead of creating a dummy object & then calling.... In short, how exactly do I create "class methods" ??

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Dabo 0.9.2 released
by Ed Leafe June 1, 2009

June 1, 2009

At long last, we are finally releasing Dabo 0.9.2. This fixes the errors that were found in 0.9.1; adds a brand-new Web Update implementation that should make keeping current much easier, as well as a whole bunch of improvements under the hood. You can grab the latest version at http://dabodev.com/download. -- Ed Leafe

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what is the biggest number that i can send to Wave_write.writeframes(data)
by '2+ June 1, 2009

June 1, 2009

would like to take advantage of the wave module found a good example here: http://www.python-forum.org/pythonforum/viewtopic.php?f=2&t=10644 hmm .. i don't get how to write a stereo .. i mean i can set nchannels .. but how do i actually take control of each ch individually? and what's the range(in float) of the data i can set in wav_file.writeframes(struct.pack('h', data))? tia -- SaRiGaMa's Oil Vending Orchestra is podcasting: http://sarigama.namaste.jp/podcast/rss.xml and supplying oil.py for free: http://oilpy.blogspot.com/

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"TypeError: 'int' object is not callable"
by Visco Shaun June 1, 2009

June 1, 2009

when I was executing the below code I got "TypeError: 'int' object is not callable" exception. Why is it so? if type(c) == type(ERROR): c can be a string or an integer representing an error -- Thanks & Regards visco

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BMP32 for linux
by Djames Suhanko June 1, 2009

June 1, 2009

Hello, all! Did you know the bmp32 module for linux? This module can to load bmp image with alpha channel where is not supported others images formats. But I couldn't to found this module to install in my linux box. :-( do you have tips? Thanks ! -- Djames Suhanko LinuxUser 158.760

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Re: automated web with python?
by P. Kaminski June 1, 2009

June 1, 2009

OK, thanks, I'll give it a try,

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Re: "TypeError: 'int' object is not callable"
by Richard Brodie June 1, 2009

June 1, 2009

"Visco Shaun" <visco31(a)gmail.com> wrote in message news:mailman.966.1243852864.8015.python-list@python.org... > when I was executing the below code I got "TypeError: 'int' object is > not callable" exception. Why is it so? > > if type(c) == type(ERROR): You've probably assigned to type somewhere in your code. What does print repr(type) give?

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NameError function not found
by Cameron Pulsford June 1, 2009

June 1, 2009

Hey everyone, I am extremely stumped on this. I have 2 functions.. def _determinant(m): return m[0][0] * m[1][1] - m[1][0] * m[0][1] def cofactor(self): """Returns the cofactor of a matrix.""" newmatrix = [] for i, minor in enumerate(self.minors()): newmatrix.append(_determinant(minor.matrix) * ((i%2) * -1)) return newmatrix And I get the following error when I try to run a.cofactor()... "NameError: global name '_determinant' is not defined" When I put the _determinant function nested within the cofactor function it works fine. Normally I would do this, but a lot of other methods use the _determinant method. They are both in the same class, and they are at the same level, they are even in that order so I know it should be able to see it. I have a lot of functions that call other functions in this class and everything is fine. [Also for the picky, I know my cofactor method isn't mathematically correct yet ;-) ] Am I missing something obvious here? Also if it helps the rest of the code is here http://github.com/dlocpuwons/pymath/blob/d1997329e4473f8f6b5c7f11635dbd719d… though it is not the latest.

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Turning HTMLParser into an iterator
by samwyse June 1, 2009

June 1, 2009

I'm processing some potentially large datasets stored as HTML. I've subclassed HTMLParser so that handle_endtag() accumulates data into a list, which I can then fetch when everything's done. I'd prefer, however, to have handle_endtag() somehow yield values while the input data is still streaming in. I'm sure someone's done something like this before, but I can't figure it out. Can anyone help? Thanks.

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Re: pygame error: file is not a windows bmp file
by aahz＠pythoncraft.com June 1, 2009

June 1, 2009

In article <mailman.890.1243602688.8015.python-list(a)python.org>, Djames Suhanko <djames.suhanko(a)gmail.com> wrote: > >"pygame error: file is not a windows bmp file" > > I couldn't found a solution for this problem. >My python script run fine in local machine using cxfreeze, but don't >work when copied to my live linux system. >If I put bmp image, works fine, but png don't. >Can you help me? Convert with PIL? http://www.pythonware.com/products/pil/ -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ my-python-code-runs-5x-faster-this-month-thanks-to-dumping-$2K- on-a-new-machine-ly y'rs - tim

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