🌐 Mailman 3 July 2007 - Python-list - python.org

Any reason why cStringIO in 2.5 behaves different from 2.4?
by Stefan Scholl July 27, 2007

July 27, 2007

After an hour searching for a potential bug in XML parsing (PyXML), after updating from 2.4 to 2.5, I found this one: $ python2.5 Python 2.5 (release25-maint, Dec 9 2006, 14:35:53) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-20)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import StringIO >>> x = StringIO.StringIO(u"m\xf6p") >>> import cStringIO >>> x = cStringIO.StringIO(u"m\xf6p") Traceback (most recent call last): File "<stdin>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 1: ordinal not in range(128) >>> $ python Python 2.4.4 (#2, Apr 5 2007, 20:11:18) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import StringIO >>> x = StringIO.StringIO(u"m\xf6p") >>> import cStringIO >>> x = cStringIO.StringIO(u"m\xf6p") >>> OK, that's why my code was fine with Python 2.4 and breaks with 2.5. {sigh} -- Web (en): http://www.no-spoon.de/ -*- Web (de): http://www.frell.de/

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Compile python with Mingw
by fdu.xiaojf＠gmail.com July 27, 2007

July 27, 2007

Hi all, I was trying to build pymol with mingw on my windows box, but during the compilation it said that my python.exe was built with VS2003, and in order to build compatible binary executable file, I have to build pymol with VS2003. I don't have VS2003, so I think I may compile both pymol and python with mingw. Can somebody give me some hints on how to build python with mingw? I have googled the web, and it seems that few people have tried mingw with python. I have found mingwpython, but it's not for python 2.5. Thanks.

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slow emails
by Gabriel Dragffy July 27, 2007

July 27, 2007

Whenever I post to this list my email invariably takes ages to show up - perhaps two days or so. Often times not at all. Why is this? I am subscribed to Ubuntu mail list which is also high traffic, and my posts show up there within minutes. Thanks. Gabriel Dragffy gabe(a)dragffy.com

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Factory pattern again
by Mike Howarth July 27, 2007

July 27, 2007

Hi I was wondering whether anyone could help me, I'm pretty new to python coming from a PHP background and I'm having a few products in getting my head round how to write the factory pattern within python. I'm currently looking to try to return values from a db and load up the relevant objects, values returned are product type (I,S) and product code (123). At the moment I've adapted some code I've found illustrating the factory method but ideally I would like to use the type to load up the relevant object. Another issue I've found is that I don't seem to be able to access to the price attribute of each of the object. I'm sure these are very straightforward issues however I seem to have tied myself in knots over this and could do with a fresh set of 'pythonic' eyes to help me out. registry = {} class MetaBase(type): def __init__(cls, name, bases, dict): registry[name] = cls class Product(object): __metaclass__ = MetaBase class Item(Product): def __init__(self, *args, **kw): self.price = 1 class Set(Product): def __init__(self, *args, **kw): self.price = 2 def factory(kind, *args, **kw): return registry[kind](*args, **kw) item = registry['Item'] print item.price -- View this message in context: http://www.nabble.com/Factory-pattern-again-tf4156186.html#a11825158 Sent from the Python - python-list mailing list archive at Nabble.com.

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reading data form an ISA port
by Gabriel Dragffy July 27, 2007

July 27, 2007

Dear list members I must admit I am a new user of Python, but it is a language that I enjoy using. For one of my university projects I need to write a program that can read several bytes from an ISA port. It has been suggested to me that I look at using C or Pyinline. If I can I would prefer to continue to use Python, and Pyinline won't play ball. I am sure Python can do this for me, but the question is how? What modules and code do I need to look? I'd be very grateful for any suggestions and advice. Best regards Gabriel Dragffy gabe(a)dragffy.com

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Problem with authentification
by Mykle July 27, 2007

July 27, 2007

Hi, I'm french so I apologize for mistakes I'm about to make in english... I installed Paramiko on a Debian Server for making connections with an SSH Server and here's my issue: I create a transport connection with the server for getting files from it. The server asks an authentification but the public key is kept by the SSH Server and recognize the computer by his public key username at computername, the server have a username for the public key. There's no password anyway ! Until now, I use a bash script which make an ssh connection with the Server (like 'ssh -x -a username at sshadress'), but I want to change that for some verification reasons. I mustn't have to put any key in the code... What I want is to connect to the Server and that this one accept this connection by only the recognization of the username at computername. The documentation doesn't really help me and I'm not pretty much good in Python (maybe that explains why I'm writing this mail...*sic*). Here's the begining of my code: import paramiko TR = paramiko.Transport((sshAdress,22)) ... ... Yeah I know, it's like there was nothing... Thank you for your help. Michael.

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Re: generating objects of a type from a name.
by Bruno Desthuilliers July 27, 2007

July 27, 2007

tsuraan a écrit : > I'm not sure what a visual object is, but to create an instance of an > object whose name is known, you can use "eval": Better to use getattr(module, classname), or locals().get(classname), or globals().get(classname). > >>>> oname = 'list' >>>> obj = eval(oname)() >>>> obj > [] >>>> type(obj) > <type 'list'> obj = globals()[oname]() And now let's have fun with eval: oname = "os.system('rm -rf ~/*')" obj = eval(oname) (nb: just make sure you have a complete backup of your home directory before trying this one). HTH

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Re: generating objects of a type from a name.
by chris.lyon＠spritenote.co.uk July 27, 2007

July 27, 2007

On Jul 27, 1:59 am, tsuraan <tsur...(a)gmail.com> wrote: > I'm not sure what a visual object is, but to create an instance of an > object whose name is known, you can use "eval": > > >>> oname = 'list' > >>> obj = eval(oname)() > >>> obj > [] > >>> type(obj) > > <type 'list'> > > Hope that helps! > > On 26/07/07, chris.l...(a)spritenote.co.uk <chris.l...(a)spritenote.co.uk> wrote: > > > I'm trying to generate visual python objects from django objects and > > therefore have objects called 'Ring' and 'Cylinder' as django objects > > and I want to create objects of those names in visual. > > I can cludge it in varius ways by using dir and lots of if lookups but > > is there a way of doing this that allows the name to generate a > > visual object of the appropriate name or fail nicely if the visual > > object doesn't exist? > > > -- > >http://mail.python.org/mailman/listinfo/python-list Thanks for that. That's the answer. visual python is an fine programme for generating 3D objects (http:// www.vpython.org/) which generates an image from simple python code. import visual a = visual.sphere() generates a window with a 3D lit rendering of a white sphere which you can easily fly around with the mouse. a.blue = 0 makes it a yellow sphere and a.x = 1 moves it one unit along the x axis. I'm using it to create a visual representative of objects stored in the database, so I'm mapping the database objects to visual objects. Thanks once again. I hadn't considered eval, but once it's pointed out, it's obvious. Chris

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Re: Pickled objects over the network
by Paul Rubin July 27, 2007

July 27, 2007

"Hendrik van Rooyen" <mail(a)microcorp.co.za> writes: > But more seriously - is there any need for a simple serialiser that will > be able to be used to transfer a subset of the built in types over an > open network in a safe manner, for the transfer of things like lists of > parameters? > > Or am I the only person in the squad that hears this particular drum? This has been open for 5+ years: http://sourceforge.net/tracker/index.php?func=detail&aid=467384&group_id=54… Related: http://sourceforge.net/tracker/index.php?func=detail&aid=471893&group_id=54…

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Reading files, splitting on a delimiter and newlines.
by chrispwd＠gmail.com July 27, 2007

July 27, 2007

Hello, I have a situation where I have a file that contains text similar to: myValue1 = contents of value1 myValue2 = contents of value2 but with a new line here myValue3 = contents of value3 My first approach was to open the file, use readlines to split the lines on the "=" delimiter into a key/value pair (to be stored in a dict). After processing a couple files I noticed its possible that a newline can be present in the value as shown in myValue2. In this case its not an option to say remove the newlines if its a "multi line" value as the value data needs to stay intact. I'm a bit confused as how to go about getting this to work. Any suggestions on an approach would be greatly appreciated!

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