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• Connecting to a SQL Server Compact Edition (.sdf) from an MFC application

  - by Hazerd

  Hey ! I'm building an MFC app in Visual Studio 2008 which classifies textures and I need some sort of lightweight database to hold the characteristics (just some doubles and strings) which can be: -carried around with the app on different computers; -be able to perform queries on it from the app (searches , updates ,inserts ,etc); Currently I'm looking into SQL compact edition because it was very easy to create from Visual Studio ( I also need only one table) but I having a hard time connecting and updating the db from C++. This is what I've found on msdn regarding C++ and SQLCE: public: void createSqlCeConnection(){ SqlCeConnection* myConnection = new SqlCeConnection(); myConnection->ConnectionString = "DataSource = blabla.sdf"; MessageBox::Show(String::Format( S"Connection State: {0}", __box(myConnection->State))); } Unfortunately my experience with .net apps is pretty limited. Hopefully you bright minds could tell me if I'm on the right path and what links and includes should I add for this to work with an C++ MFC projects. Thanks !

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• How can i bundle other files when using cx_freeze?

  - by Mridang Agarwalla

  I'm using Python 2.6 and cx_Freeze 4.1.2 on a Windows system. I've created the setup.py to build my executable and everything works fine. When cx_Freeze runs it movies everything to the build directory. I have some other files that i would like included in my build directory. How can i do this? Here's my structure. src\ setup.py janitor.py README.txt CHNAGELOG.txt helpers\ uncompress\ unRAR.exe unzip.exe Here's my snippet: setup ( name='Janitor', version='1.0', description='Janitor', author='John Doe', author_email='[email protected]', url='http://www.this-page-intentionally-left-blank.org/', data_files = [ ('helpers\uncompress', ['helpers\uncompress\unzip.exe']), ('helpers\uncompress', ['helpers\uncompress\unRAR.exe']), ('', ['README.txt']) ], executables = [ Executable\ ( 'janitor.py', #initScript ) ] ) I can't seem to get this to work. Do i need a MANIFEST.in file? Thank you.

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• Inherit a parent class docstring as __doc__ attribute

  - by Reinout van Rees

  There is a question about Inherit docstrings in Python class inheritance, but the answers there deal with method docstrings. My question is how to inherit a docstring of a parent class as the __doc__ attribute. The usecase is that Django rest framework generates nice documentation in the html version of your API based on your view classes' docstrings. But when inheriting a base class (with a docstring) in a class without a docstring, the API doesn't show the docstring. It might very well be that sphinx and other tools do the right thing and handle the docstring inheritance for me, but django rest framework looks at the (empty) .__doc__ attribute. class ParentWithDocstring(object): """Parent docstring""" pass class SubClassWithoutDoctring(ParentWithDocstring): pass parent = ParentWithDocstring() print parent.__doc__ # Prints "Parent docstring". subclass = SubClassWithoutDoctring() print subclass.__doc__ # Prints "None" I've tried something like super(SubClassWithoutDocstring, self).__doc__, but that also only got me a None.

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• Freezing a dual-mode (GUI and console) application using cx_Freeze

  - by Mridang Agarwalla

  Hi, I've developed a Python application that runs both in the GUI mode and the console mode. If any arguments are specified, it runs in a console mode else it runs in the GUI mode. I've managed to freeze this using cx_Freeze. I had some problems hiding the black console window that would pop up with wxPython and so I modified my setup.py script like this: import sys from cx_Freeze import setup, Executable base = None if sys.platform == "win32": base = "Win32GUI" setup( name = "simple_PyQt4", version = "0.1", description = "Sample cx_Freeze PyQt4 script", executables = [Executable("PyQt4app.py", base = base)]) This works fine but now when I try to open up my console and run the executable from there, it doesn't output anything. I don't get any errors or messages so it seems that cx_Feeze is redirecting the stdout somewhere else. Is is possible to get it to work with both mode? Nothing similar to this seems to be documented anywhere. :( Thanks in advance. Mridang

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• Are there any existing batch log file aggregation solutions?

  - by Mohan Gulati

  I wish to export from multiple nodes log files (in my case apache access and error logs) and aggregate that data in batch, as a scheduled job. I have seen multiple solutions that work with streaming data (i.e think scribe). I would like a tool that gives me the flexibility to define the destination. This requirement comes from the fact that I want to use HDFS as the destination. I have not been able to find a tool that supports this in batch. Before re-creating the wheel I wanted to ask the StackOverflow community for their input. If a solution exists already in python that would be even better.

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• How to log in to a website using installed twill?

  - by brilliant

  Hello, everybody!!!! I have just successfully installed TWILL on my computer with the help of one very supportive member of "StackOverflow" (you can check it out HERE) and have tried to run one of the simple examples on the twill documentation page (you can see that page HERE). Here is that example: Let's say my username on www.slash.org is lynxye and my password is mammal. When I try to enter that example code into my Python prompt, I can only type and enter the first line of the code because when I click on "Enter" to start a new line, I get some error messages right away: The same happens when I try to enter this code into my terminal: I think I miss out on some basics here. Perhaps, I need to create a file that would contain that code and then run that file somehow, but I really don't know where I need to create that file and with what extensdion. Can anyone, please, help me with this?

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• Why does "enable-shared failed" happen on libjpeg build for os X?

  - by BryanWheelock

  I'm trying to install libjpeg on os X to fix a problem with the Python Imaging Library JPEG setup. I downloaded libjpeg from http://www.ijg.org/files/jpegsrc.v7.tar.gz I then began to setup the config file cp /usr/share/libtool/config.sub . cp /usr/share/libtool/config.guess . ./configure –enable-shared However, the enable-shared flag didn't seem to work. $ ./configure –-enable-shared configure: WARNING: you should use --build, --host, --target configure: WARNING: invalid host type: –-enable-shared checking build system type... Invalid configuration `–-enable-shared': machine `–-enable' not recognized configure: error: /bin/sh ./config.sub –-enable-shared failed I've done lot's of google searches and I can't figure out where the error is or how to work around this error.

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• Trouble using eval() with cython

  - by Peter Stewart

  I was trying to speed up some code, and then I tried compiling a class and a function using cython and WOW! I havn't measured it yet but it looks at least 10x faster. I first looked at cython just two days ago, I'm very impressed! However, I can't get eval() to work. def thefirst(int a): d = eval('1+2+a') return d I compile this to module1.pyd file and call it with the python file: from module1 import thefirst x = thefirst(2) print x This returns: NameError: name 'a' is not defined. All help is appreciated.

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• realtime collaborative editing: mobwrite on windows7 x64

  - by collabwriter

  I have set up Mobwrite on my Win7 development machine using the daemon and q.py listener. The client test suite passes, but when I run the server test suite, everything fails with this sort of response: Question: U:user10259538167863824 f:0:unittest10259538167863824 R:0:Hello world Expected: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Actual: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Diff: u:user10259538167863824 ¶ F:0:unittest10259538167863824 ¶ D:0:=11¶ ¶ ¶ I am assuming it has something to do with line endings, but I don't know what to do. Can anyone shed some light on this? Thanks so much! PS: I'm running Python 2.7

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• Django 1.2 object level permissions - third party solutions?

  - by mawimawi

  Since Django 1.2 final is almost out, I am curious if there are already projects that use the new object level permissions / row level permissions system. [django-authority][1] which is a possible solution for Django up to 1.1 has not been updated for a while, and does not (yet) use the new permissions system. It seems to me that Django-Authority is in a comatose state. Does someone know about upcoming or maybe even finished solutions? I'd appreciate any good links to active projects with at least some downloadable content very much. [1]: http://packages.python.org/django-authority/ django-authority

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• RegEx - Match optional groups

  - by Maurizio

  I know RE is not the best way to scrape HTMLs, but this is it... I have some something like: <td> Writing: <a href="creator.php?c=CCh">Carlo Chendi</a> Art: <a href="creator.php?c=LBo">Luciano Bottaro</a> </td> And I need to match the Writing and Art parts. But it is not said they're there and there could be other parts like Ink and Pencils... How do i do this ? I need to use pure Regex, no additional Python libs... Thanks !

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• QFileDialog and german umlaute within a path

  - by MB

  Hey Everybody, i am working on a project, which i am developing with Python and PyQT4. I have stumbled upon a somewhat odd behaviour of the QFileDialog, that is not occuring when running the project within in my IDE (Eclipse). The problem is that QFileDialog in ExistingFiles-mode does fail to return the list of selected files, when one of the file paths is containing a german umlaut (ä,ü,ö, etc.) The QFileDialog is not offering options or parameters to make it sensible regarding this scenario. Does anyone have any ideas of how to tackle this issue?

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• Significant figures in the decimal module

  - by Jason Baker

  So I've decided to try to solve my physics homework by writing some python scripts to solve problems for me. One problem that I'm running into is that significant figures don't always seem to come out properly. For example this handles significant figures properly: from decimal import Decimal >>> Decimal('1.0') + Decimal('2.0') Decimal("3.0") But this doesn't: >>> Decimal('1.00') / Decimal('3.00') Decimal("0.3333333333333333333333333333") So two questions: Am I right that this isn't the expected amount of significant digits, or do I need to brush up on significant digit math? Is there any way to do this without having to set the decimal precision manually? Granted, I'm sure I can use numpy to do this, but I just want to know if there's a way to do this with the decimal module out of curiosity.

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• Can one prevent Genshi from parsing HTML entities?

  - by DNS

  I have the following Python code using Genshi (simplified): with open(pathToHTMLFile, 'r') as f: template = MarkupTemplate(f.read()) finalPage = template.generate().render('html', doctype = 'html') The source HTML file contains entities such as &copy;, &trade; and &reg;. Genshi replaces these with their UTF-8 character, which causes problems with the viewer (the output is used as a stand-alone file, not a response to a web request) that eventually sees the resulting HTML. Is there any way to prevent Genshi from parsing these entities? The more common ones like &amp; are passed through just fine.

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• Can't use FAXCOMEXLib in VS 2010 anymore?

  - by Sam

  I'm just in the process of moving from Visual Studio 2008 to Visual Studio 2010. One of my projects use the Microsoft Fax Service Extended COM Type Library. After converting the project to VS 2010 I get the following compiler error: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.Targets(1558,9): error MSB3648: The Keycontainer-path "VS_KEY_812A0248FF872DEC" ist invalid. KeyContainer must point to an existing file. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.Targets(1558,9): warning MSB3283: Wrapperassembly for type library "FAXCOMEXLib" not found. I tried to remove FAXCOMEXLib from the project and adding it again, but it did not help. I got a similar problem with other COM references. How do I resolve this?

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• How to stop the Bottle webserver when started from subprocess

  - by luc

  Hello all, I would like to embed the great Bottle web framework into a small application (1st target is Windows OS). This app starts the bottle webserver thanks to the subprocess module. import subprocess p = subprocess.Popen('python websrv.py') The bottle app is quite simple @route("/") def index(): return template('index') run(reloader=True) It starts the default webserver into a Windows console. All seems Ok except the fact that I must press Ctrl-C to close the bottle webserver. I would like that the master app terminates the webserver when it shutdowns. I can't find a way to do that (p.terminate() doesn't work in this case unfortunately) Any idea? Thanks in advance

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• TimeZoneInfo - why can't i seem to create an instance of it?

  - by Kravlin

  I'm trying to use the EWS API to access an Exchange server from a console program i'm writing. I've specified the type of exchange server i'm connecting to but when I try to execute the code i have, it gives me Error 1 The type 'System.TimeZoneInfo' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. C:\Documents and Settings\jsorensen\My Documents\Visual Studio 2005\Projects\ConsoleApplication2\ConsoleApplication2\Program.cs 26 13 ConsoleApplication2 Does Microsoft Visual Studio Academic Edition not support TimeZoneInfo or is the version of .Net that XP can have not up-to date enough to work with the EWS API? I'm moderately new to programming in C# so some of the stuff is still confusing. Thanks.

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• Changing Element Value in Existing XML File Using DOM

  - by rylic38

  Hi All, I am trying to find examples of how to change an existing xml files Element Value. Using the following xml example: <book> <title>My Book</title> <author>John Smith</author> </book> If I wanted to replace the author element value 'John Smith' with 'Jim Johnson' in a Python script using DOM, how would I go about doing so? I've tried to look for examples on this, but have failed in doing so. Any help would be greatly appreciated. Regards, Rylic

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• How do I create an empty array/matrix in NumPy?

  - by Ben

  I'm sure I must be being very dumb, but I can't figure out how to use an array or matrix in the way that I would normally use a list. I.e., I want to create an empty array (or matrix) and then add one column (or row) to it at a time. At the moment the only way I can find to do this is like: mat = None for col in columns: if mat is None: mat = col else: mat = hstack((mat, col)) Whereas if it were a list, I'd do something like this: list = [] for item in data: list.append(item) Is there a way to use that kind of notation for NumPy arrays or matrices? (Or a better way -- I'm still pretty new to python!)

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• Continous Build Integration with SourceSafe and Batch Files

  - by CraigS

  I want to create a continuous build integration system for .NET using just Windows batch files and Visual Source Safe. I've come up with the following batch file so far - set ssdir=\\xxxx\vss cd d:\mydir "C:\Program Files\Microsoft Visual SourceSafe\ss.exe" diff "$/sourcedir" -R -Q > diffout.txt This will spit out a file containg lines like "SourceSafe files different from local files" when a change has been made. My challenge is to figure out if those lines are in the file, then do a get and kick off MSBuild if they are. I'd then schedule the batch file to run every 10 minutes or so. Anyone got any thoughts on how to do that? Or any other ways of doing continuous build integration without downloading a complicated build automation system? Update: Happy to use cscript or powershell too, though not really familiar with those environments. My main aim is to avoid installing 3rd party software

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• Idiomatic way to do list/dict in Cython?

  - by ramanujan

  My problem: I've found that processing large data sets with raw C++ using the STL map and vector can often be considerably faster (and with lower memory footprint) than using Cython. I figure that part of this speed penalty is due to using Python lists and dicts, and that there might be some tricks to use less encumbered data structures in Cython. For example, this page (http://wiki.cython.org/tutorials/numpy) shows how to make numpy arrays very fast in Cython by predefining the size and types of the ND array. Question: Is there any way to do something similar with lists/dicts, e.g. by stating roughly how many elements or (key,value) pairs you expect to have in them? That is, is there an idiomatic way to convert lists/dicts to (fast) data structures in Cython? If not I guess I'll just have to write it in C++ and wrap in a Cython import.

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• Including a pyd directly in a setup.py file

  - by Philippe Beaudoin

  I have a complex build process to generate a couple of python extension modules (.pyd). I want to include these in my setup.py for use with distutils. The distutils page talks in length about how to add extension modules from source, but I'd want to simply package these precompiled .pyd. What is the best practice to do this? Eventually, I'd also like to freeze everything in an executable with py2exe. Will I be able to do this if I directly specify the .pyd?

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• Best language to learn complementing java

  - by danielrutledge

  Hi all, I'm a somewhat experienced java ee developer, and I wish to complement my background by learning a newish language. I'm recently out of school where I did a ton of scientific computing and some functional programming, so I'm pretty comfortable with those families of languages. If at all possible, I'd like to pick a language with some market value, though I know this is tough to gauge. After snooping around a bit, the consensus seems to be one of Python/Ruby/Perl; how would each of these work with java in a web application environment, and in your opinion which complements it best? Any other suggestions for languages would also be welcome.

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• Scapy PcapReader and packets time

  - by auino

  I'm reading a PCAP file using Scapy using a script such as the (semplified) following one: #! /usr/bin/env python from scapy.all import * # ... myreader = PcapReader(myinputfile) for p in myreader: pkt = p.payload print pkt.time In this case the packets time is not relative to PCAP capture time, but starts from the instant I've launched my script. I'd like to start from 0.0 or to be relative to the PCAP capture. How can I fix it (possibly without "manually" retrieving the first packet time and repeatedly using math to fix the problem)?

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• How to add class to openframeworks project in VS2012

  - by Mr Bell

  I am normally a C# guy but trying to get into c++. I made myself a new openframeworks project by copying and pasting one of the example projects and then renaming everything to my project name. (If there is an easier way, I would love to hear it) This project has the .cpp and .h files in a sub folder called "src" which are in turn organized into virtual folders (filters???) in visual studio. How can I add a class to this project from within visual studio? If I right click on the src filter in the solution explorer and hit add class. It creates the class files at the root of the project not in the src folder. I mean it does this both in the solution explorer and where it physically places the files. This is a problem because I can't include my class files in the rest of my app, presumably because they aren't in the same folder What is the proper way to add a class file?

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