🌐 Mailman 3 August 2006 - Python-list - python.org

Can't get LCHARVAR's with InformixDB
by fhurley＠gmail.com Aug. 1, 2006

Aug. 1, 2006

I'm using the InformixDB package, which has been a real lifesaver, but I'm finding I can't get any data from the Informix LCHARVAR types. They're coming in as empty strings. The cursor._description for the field in question is: ('msg_text', 'lvarchar', 0, 0, None, None, 1) Appreciate any help... thanks.

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Re: Strange Tkinter Grid behaviour Problem
by Eric Brunel Aug. 1, 2006

Aug. 1, 2006

On Tue, 01 Aug 2006 14:14:51 +0200, H J van Rooyen <mail(a)microcorp.co.za> wrote: > Hi, > > Still struggling with my GUI exercise - > > I have the following lines of code in a routine that is bound at > <Key-Return> to > an instance of Entry : > > self.disp.Amount_des = Label(self.disp, text = self.dis_string, > fg = > 'black', bg = 'yellow') > self.disp.Amount_des.grid(row = self.rownum, column=0, sticky = > 'nesw') > > self.disp.Amount = Label(self.disp, text = self.retstring, fg = > 'black', > bg = 'green') > self.disp.Amount.grid(row = self.rownum, column=1, sticky = > N+S+E+W) > > The second call to the grid method fails as follows: > > Exception in Tkinter callback > Traceback (most recent call last): > File "E:\PYTHON24\lib\lib-tk\Tkinter.py", line 1345, in __call__ > return self.func(*args) > File "C:\WINDOWS\DESKTOP\Entry1.py", line 243, in entryend > self.disp.Amount.grid(row = self.rownum, column=1, sticky = N+S+E+W) > TypeError: cannot concatenate 'str' and 'instance' objects > > If I change the N+S+E+W to the 'nsew' form, it works no problem... > > Weird - at other places in the program the form: sticky = N+S+E+W works > without > a problem. Simple: you have in this context a local or global variable named either N, S, W or E, shadowing the constant defined in the Tkinter module. You can find it by inserting a line like: print repr(N), repr(S), repr(W), repr(E) before your self.disp.Amount.grid in your code. This line should print: 'n' 's' 'w' 'e' but I guess it won't... The solutions are: - Rename your variable. - Always use the string form, i.e 'nswe'. This is the standard in native tk. The N, S, W and E constants are just defined for convenience in Tkinter. - Do not use "from Tkinter import *" to import the module, but something like "import Tkinter as tk", and then prefix all names in this module by 'tk.'. So your code above becomes: self.disp.Amount = tk.Label(self.disp, text = self.retstring, fg = 'black', bg = 'green') self.disp.Amount.grid(row = self.rownum, column=1, sticky = tk.N+tk.S+tk.E+tk.W) (I'm personnally not a big fan of this last solution, since I find it clobbers the code a lot and decreases readability. But it's usually the best way to avoid name clashes...) [snip] HTH -- python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

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PyGreSQL, DLL search path, IDLE versus python command line
by h112211＠gmail.com Aug. 1, 2006

Aug. 1, 2006

Hi all, I'm using the Windows version of Python 2.4.3 and everything worked okay until I installed PyGreSQL. Well, in fact the installation went fine, but when I try to run my script from IDLE I get: Traceback (most recent call last): File "<pathtomyscript>\main.py", line 3, in -toplevel- import pgdb File "C:\Program Files\Python24\Lib\site-packages\pgdb.py", line 69, in -toplevel- from _pg import * ImportError: DLL load failed: The specified module could not be found. A quick surfing session suggested that this happens because libpq.dll cannot be found. However, if I start the Python command line (from the installer-created start menu shortcut) I can "import pgdb" without any errors whatsoever. And yes, the dir containing libpq.dll is in my windows path. Anyone know why the the command line finds everything but IDLE doesn't?

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[ANN] LibYAML-0.0.1: The initial release
by Kirill Simonov Aug. 1, 2006

Aug. 1, 2006

I'd like to announce the initial release of LibYAML, a YAML parser and emitter library written in C. LibYAML homepage: http://pyyaml.org/wiki/LibYAML TAR.GZ package: http://pyyaml.org/download/libyaml/yaml-0.0.1.tar.gz SVN repository: http://svn.pyyaml.org/libyaml Bug tracker: http://pyyaml.org/newticket?component=libyaml The library is functionally complete, but the documentation is scarce and the API is subject to change. For more information, you may check the project homepage, the doxygen-generated documentation in the `doc` directory of the source distribution, and the examples `tests/example-reformatter.c` and `tests/example-deconstructor.c`. There are preliminary Python bindings for LibYAML in the PyYAML SVN repository. LibYAML is written by Kirill Simonov <xi(a)resolvent.net>. It is released under the MIT license. See the file LICENSE for more details. This project is developed for Python Software Foundation as a part of the Google Summer of Code program under the mentorship of Clark C. Evans.

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Strange Tkinter Grid behaviour Problem
by H J van Rooyen Aug. 1, 2006

Aug. 1, 2006

Hi, Still struggling with my GUI exercise - I have the following lines of code in a routine that is bound at <Key-Return> to an instance of Entry : self.disp.Amount_des = Label(self.disp, text = self.dis_string, fg = 'black', bg = 'yellow') self.disp.Amount_des.grid(row = self.rownum, column=0, sticky = 'nesw') self.disp.Amount = Label(self.disp, text = self.retstring, fg = 'black', bg = 'green') self.disp.Amount.grid(row = self.rownum, column=1, sticky = N+S+E+W) The second call to the grid method fails as follows: Exception in Tkinter callback Traceback (most recent call last): File "E:\PYTHON24\lib\lib-tk\Tkinter.py", line 1345, in __call__ return self.func(*args) File "C:\WINDOWS\DESKTOP\Entry1.py", line 243, in entryend self.disp.Amount.grid(row = self.rownum, column=1, sticky = N+S+E+W) TypeError: cannot concatenate 'str' and 'instance' objects If I change the N+S+E+W to the 'nsew' form, it works no problem... Weird - at other places in the program the form: sticky = N+S+E+W works without a problem. I found the 'nsew' form by trial and error... self.disp is a window different from the current one - it is used to display a record entry as it is built up field by field. - the code fragment above is what inserts the description of the entry and the entered data in a row in the window used for displaying, when the user hits the enter key. Is this a bug, or am I still doing something wrong? - Hendrik

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Any gotchas in returning a subclass instance from __new__?
by s.lipnevich＠gmail.com Aug. 1, 2006

Aug. 1, 2006

Hi All, Is anything wrong with the following code? class Superclass(object): def __new__(cls): # Questioning the statement below return super(Superclass, cls).__new__(Subclass) class Subclass(Superclass): pass if __name__ == '__main__': instance = Superclass() print instance It works here, and even constructors for Subclass and Superclass are invoked (in correct order), even though such behavior is not explicitly stated here http://docs.python.org/ref/customization.html. So, am I asking for trouble or is it /the/ way to go about transforming base class into a factory? Thank you, Sergey.

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Borg vs. Module
by tobiah Aug. 1, 2006

Aug. 1, 2006

I am making a web app, made up of many modules that all need access to some important data, like the current session data, cookies, navigation history, post/get variables, etc. I decided to go with the 'Borg' idea, by assigning the __dict__ of an object to a class variable so that each instantiation of the Borg() would share the same data. That way I can either pass the Borg around, or just Borg() it if I need it in some obscure place. Then I read an argument that it usually makes more sense to just have a module with the data and functions that I need, which all the other modules can simply import. Since I only need one instance, I could just stuff data and call 'methods' on this module, probably without even changing existing syntax. Are there any arguments as to which method is better? Thanks, Toby -- Posted via a free Usenet account from http://www.teranews.com

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SOAP/WSDL Introspection
by Ben Edwards (lists) Aug. 1, 2006

Aug. 1, 2006

I have the below code to get info about SOAP services at a wsdl url. It gets the in parameters OK but does not seem to get out/return parameters. Any idea why? Ben from SOAPpy import WSDL import sys wsdlfile = "http://www.xmethods.net/sd/2001/TemperatureService.wsdl" server = WSDL.Proxy(wsdlfile) for methodName in server.methods: print "method = ", methodName callInfo = server.methods[ methodName ] for inParam in callInfo.inparams: print " inparam = ", inParam.name, inParam.type for outParam in callInfo.outparams: print " outparam = ", outParam.name, outParam.type

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RE: Python-list Digest, Vol 35, Issue 10
by support＠mathworks.co.uk Aug. 1, 2006

Aug. 1, 2006

This is an automated response. Thank you for contacting the Technical Support team at The MathWorks Ltd. A technical support representative will be contacting you within 1 business day. The following information will help us in responding to your request. If you have already provided the information requested below, no further action is required. 1) License number, release number, and operating system. Typing “ver” at the MATLAB command prompt will list this information. 2) Exact text of any error message(s) received 3) All files (M-files, Simulink models, data files) and steps to reproduce the issue. If you need to send in an executable or a zip file, please wait until a support engineer contacts you. To provide this information, reply to this message keeping the Thread Id listed at the bottom of this message intact. STUDENT VERSION USERS: If you are a student using the Student Version, please note that email and phone support is available for product installation, software crashes, or bug reporting. For all other enquiries, contact your lecturer or visit the support web site at http://www.mathworks.co.uk/support/. If you have any concerns about our technical support services, write to tsmanagers(a)mathworks.com. Technical Support Team The MathWorks Ltd Email: support(a)mathworks.co.uk Tel: 01223 423200 Fax: 01223 423250 http://www.mathworks.co.uk/support [THREAD ID: 1-2ZJL6R] -----Original Message----- From: python-list-request(a)python.org Sent: 8/1/2006 6:00:26 AM To: support(a)mathworks.co.uk Subject: Python-list Digest, Vol 35, Issue 10 Send Python-list mailing list submissions to python-list(a)python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/python-list or, via email, send a message with subject or body 'help' to python-list-request(a)python.org You can reach the person managing the list at python-list-owner(a)python.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Python-list digest..."

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Re: Borg vs. Module
by Simon Hibbs Aug. 1, 2006

Aug. 1, 2006

Jordan R McCoy wrote: > For example, the Twisted framework uses this technique to allow global > access to the installed reactor via import syntax, which works well > within the framework. It did, however, throw me a bit when I first > encountered it, and drove me to pour over the source to find out what > was happening. It sounds to me like this was a case of poor code commenting in Twisted (Iv'e not looked at it myself). It seems to me this is a useful trick, but like any unusual or clever bit of coding it's use should be carefully commented to make sure it's clear to anyone coming across it. Simon Hibbs

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