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• dump csv from sqlalchemy

  - by afilatun

  For some reason, I want to dump a table from a database (sqlite3) in the form of a csv file. I'm using a python script with elixir (based on sqlalchemy) to modify the database. I was wondering if there is any way to dump the table I use to csv. I've seen sqlalchemy serializer but it doesn't seem to be what I want. Am I doing it wrong? Should I call the sqlite3 python module after closing my sqlalchemy session to dump to a file instead? Or should I use something homemade?

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• Compressing three individual jpeg pics containing temporal redundancy?

  - by michael

  I am interfacing and embedded device with a camera module that returns a single jpeg compressed frame each time I trigger it. I would like to take three successive shots (approx 1 frame per 1/4 second) and further compress the images into a single file. The assumption here is that there is a lot of temporal redundancy, therefore lots of room for more compression across the three frames (compared to sending three separate jpeg images). I will be implementing the solution on an embedded device in C without any libraries and no OS. The camera will be taking pics in an area with very little movement (no visitors or screens in the background, maybe a tree with swaying branches), so I think my assumption about redundancy is pretty solid. When the file is finally viewed on a pc/mac, I don't mind having to write something to extract the three frames (so it can be a nonstandard cluge) So I guess the actual question is: What is the best way to compress these three images together given the fact that they are already in JPEG format (it is a possibly to convert back to a raw image, but if i dont have too...)

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• Sort by an object's type

  - by Richard Levasseur

  Hi all, I have code that statically registers (type, handler_function) pairs at module load time, resulting in a dict like this: HANDLERS = { str: HandleStr, int: HandleInt, ParentClass: HandleCustomParent, ChildClass: HandleCustomChild } def HandleObject(obj): for data_type in sorted(HANDLERS.keys(), ???): if isinstance(obj, data_type): HANDLERS[data_type](obj) Where ChildClass inherits from ParentClass. The problem is that, since its a dict, the order isn't defined - but how do I introspect type objects to figure out a sort key? The resulting order should be child classes follow by super classes (most specific types first). E.g. str comes before basestring, and ChildClass comes before ParentClass. If types are unrelated, it doesn't matter where they go relative to each other.

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• Choosing routing.yml based on user culture?

  - by Erland Wiencke

  In my Symfony application I would like to choose the routing.yml based on the current user's culture; 'en' => routing.en.yml 'no' => routing.no.yml and so forth. Any suggestion to how this can be done? Edit: I am not trying to do i18n this way - I use Symfony's built-in methods for that. I simply want "static" urls to reflect the user's language: /en/projects/internal/project-name /no/prosjekter/interne/prosjektnavn /fr/baguette/champs-elysee/foux-de-fafa Where "projects" is a module, the category "internal" and "project-name" are stored in the database.

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• First Call to a Controller, Constant is defined, Second call, "uninitialized constant Oauth"?

  - by viatropos

  I am trying to get the OAuth gem to work with Rails 3 and I'm running into this weird problem... (independent of the gem, I think I've run into this once before) I have a controller called "OauthTestController", and a model called "ConsumerToken". The model looks like this. require 'oauth/models/consumers/token' class ConsumerToken < ActiveRecord::Base include Oauth::Models::Consumers::Token end When I go to "/oauth_test/twitter", it loads the Oauth::Models::Consumers::Token module and I'm able to connect to twitter no problem. But the second time I try it (just refresh the /oauth_test/twitter url), it gives me this error: NameError (uninitialized constant Oauth): app/models/consumer_token.rb:4 app/models/twitter_token.rb:2 app/controllers/oauth_test_controller.rb:66:in `load_consumer' Why is that? It has something to do with load paths or being in development mode maybe?

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• VB.net Edit-And-Continue: ignore "unable to apply this change while debugging"

  - by FastAl

  When using VB.Net (2008) and paused in debugging, Edit-And-Continue is a great time-saver. However if you change any module/class-level information (variable, sub/function signature, etc), you get the error message like this: "unable to apply this change while debugging" While I can understand the technical challenge to making this work (and why it would be hard), it leaves me in a tight spot with just a few options: 1) Restart and recompile and get the program back to the same state 2) Continue debugging without making the change, and risk forgetting 3) Type up a reminder note to make the change All of which are annoying. Now I know that option '4) Just actually make the change' may not be possible. but does anybody know how to enable the following 'technically easy' possibility? 4) Let me change the code, get it flagged with the purple squiggly underline, so I can save it, but just ignore the change until recompile I have checked the Tools|options|debug|edit and continue, nothing appears to let me do this. thanks!

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• Doesn't get into Debug Mode

  - by Grace Jones

  When I Press F5 on my VS2005 to debug the application, it launches the web app window but it is coming out of debug mode. When I tried to trace the Error in the EventViewer, this was the error: Failed in Token.vb(GetToken). The token was not in memory and the identity of the authenticated IIS caller was not permitted. The session may have unexpectedly terminated. The specific error message included: Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the \\ section in the application configuration. I don't have any httpModules section in my config file and the sessionState mode="InProc"...

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• Accessing a dictionary value by custom object value in Python?

  - by Sam

  So I have a square that's made up of a series of points. At every point there is a corresponding value. What I want to do is build a dictionary like this: class Point: def __init__(self, x, y): self._x = x self._y = y square = {} for x in range(0, 5): for y in range(0, 5): point = Point(x,y) square[point] = None However, if I later create a new point object and try to access the value of the dictionary with the key of that point it doesn't work.. square[Point(2,2)] Traceback (most recent call last): File "<pyshell#19>", line 1, in <module> square[Point(2,2)] KeyError: <__main__.Point instance at 0x02E6C378> I'm guessing that this is because python doesn't consider two objects with the same properties to be the same object? Is there any way around this? Thanks

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• Windows Server 2008 and com objects

  - by Marthin

  Hi, im moving a Dll (built in c++) from windows 2000 server to a 2008 server but im have some trouble to register it. In 2000 all you normaly have to do is a "regsrv32 name.dll" but this will not work in 2008 because you get a pointer error, iv also tried to use "gacutil /i name.dll" because someone told me this might work, but it didnt. So, im kind of desperate, is there anyone that have some solution to how i can get this c++ dll to work in 2000 server so that i can access it from an old classic asp page. EDIT: This is the error when running regsrv: " The module "name.dll" was loaded but the entry-point DllRegisterServer was not found. Make sure that "name.dll" is a valid DLL or OCX file and then try again. " Note that i cant edit the dll file in anyway =( Best Regards Marthin

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• Best practices for using memcached in Rails?

  - by Matt

  Hello everybody, as database transcations in our app are getting more and more time consuming, we have started to use memcached to reduce the amount of queries passed to MySQL. All in all, it works fine and really saves a lot of time. But as caching was "silently appearing" as a workaround to give the app more juice, a lot of our models now contain code like this: def self.all_cached Rails.cache.fetch('object_name') { find( :all, :include => [associations]) } end This is getting more and more a pain as filling and flushing the cache happens in several classes accross the application. Now, I was wondering if there was a better way to abstract memcached logic to make it more powerful and easy to use across all needed models? I was thinking about having some kind of memcached-module which is included in all needed modules. But before playing around, I thought: Let's ask experts first :-) Thanks Matt

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• Modern, Non-trivial, Pygame Tutorials?

  - by Gregg Lind

  What are some 'good', non-trivial Pygame tutorials? I realize good is relative. As an example, a good one (to me) is the one that describes how to use pygame.camera. It's recent uses a modern PyGame (1.9) non-trivial, in that it shows how to use it the module for a real application. I'd like to find others. A lot of the ones on the Pygame site are from 1.3 era or earlier! Info on related projects, like Gloss is welcome as well. (If your answer is "read the source of some pygame games", please link to the source of particular ones and note what is good about them)

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• How to redirect every uri calls to one controller, except some static ones?

  - by Oden

  Hey, Im using codeigniter and want to make my portal a bit more seo friendly. I have a controller (articles) witch handles every article, on my portal. The URL looks like this: example.com/articles/category-sub-category/article-name I'm using mod rewrite module to hide my index.php, and codeigniter routing to hide the controller action that handles every call. I want to hide articles too, but if i hide it, every call goes to the articles controller, and thats not what i want, because i want my url look like this: example.com/category-sub-category/article-name Ive tried it with regexp routing rules in the routes.php but i found no way to make it right.

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• Where to put my xUnit tests for an F# assembly?

  - by Benjol

  I'm working on my first 'real' F# assembly, and trying to do things right. I've managed to get xUnit working too, but currently my test module is inside the same assembly. This bothers me a bit, because it means I'll be shipping an assembly where nearly half the code (and 80% of the API) is test methods. What is the 'right' way to do this? If I put the tests in another assembly, I think that means I have to expose internals that I'd rather keep private. I know that in C# there is a friend mechanism for tests (if that's the right terminology), is there an equivalent in F#? Alternatively, can anyone point me to an example project where this is being done 'properly'?

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• Special Character Meanings Defined

  - by Noctis Skytower

  In Python's module named string, there is a line that says whitespace = ' \t\n\r\v\f'. ' ' is a space character. '\t' is a tab character. '\n' is a newline character. '\r' is a carriage-return character. '\v' maps to '\x0b' (11). What does it mean and how might it be typed on a keyboard (any OS)? '\f' maps to '\x0c' (12). What does it mean and how might it be typed on a keyboard (any OS)?

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• org.apache.http.impl.cookie.BasicClientCookie not serializable???

  - by Misha Koshelev

  Dear All: I am quite confused... I am reading here and BasicClientCookie clearly implements Serializable per JavaDoc: http://hc.apache.org/httpcomponents-client/httpclient/apidocs/org/apache/http/impl/cookie/BasicClientCookie.html However, my simple Groovy script: #!/usr/bin/env groovy @Grapes( @Grab(group='org.apache.httpcomponents', module='httpclient', version='4.0.1') ) import org.apache.http.impl.cookie.BasicClientCookie import java.io.File def cookie=new BasicClientCookie("name","value") println cookie instanceof Serializable def f=new File("/tmp/test") f.withObjectOutputStream() { oos-> oos.writeObject(cookie) } outputs: false Caught: java.io.NotSerializableException: org.apache.http.impl.cookie.BasicClientCookie at t$_run_closure1.doCall(t.groovy:12) at t.run(t.groovy:11) I have checked and I have no other versions of HttpClient anywhere in classpath (if I take Grapes statement out it cannot find file). Thank you! Misha Koshelev

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• MIDlet + BlackBerry API = verification error?

  - by Kilnr

  Hi, Is there any way to write a MIDlet, but still use BlackBerry API classes and functions (including the APIs that require code signing)? In particular, I'm trying to use Kuix (http://www.kalmeo.org/projects/kuix). A pure MIDlet + Kuix (so without BlackBerry stuff) works perfectly after I converted the jar/jad to a cod file. As soon as I add BlackBerry API-stuff (CoverageInfo.COVERAGE_DIRECT in this case) I get a verification error when trying to run the cod file: Error starting $name: Module $name has verification error 2410 at offset 9a4f What can I do to solve this?

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• Add image gallery to node in Drupal

  - by vian

  I'm using Image module for Drupal 6 and the submodule of Image Gallery. Image gallery is identified by taxonomy term of certain vocabulary. What I need is to attach Image Gallery View supplied with Image Gallery to certain node. I am now trying to use Views Attach to do this. But how can I pass an argument of taxonomy term for gallery to the view? Also I added the taxonomy term for gallery to be defined for both images and my node type. Is it ok?

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• Parsing specific numeric data from csv file using python

  - by KJ Lim

  Good morning. I have series of data in cvs file like below, 1,,, 1,137.1,1198,1.6 2,159,300,0.4 3,176,253,0.3 4,197,231,0.3 5,198,525,0.7 6,199,326,0.4 7,215,183,0.2 8,217.1,178,0.2 9,244.2,416,0.5 10,245.1,316,0.4 I want to extract specific data from second column for example 217.1 and 245.1 and have them concatenated into a new file like, 8,217.1,178,0.2 10,245.1,316,0.4 I use cvs module to read my cvs file, but, I can't extract specific data as I desire. Could anyone kindly please help me. Thank you.

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• How can I hide the taxonomy field for authenticated users but show it for other users in Drupal 6?

  - by Jaymie

  I have a Drupal (v6.17) Content Type which includes a Taxonomy field. I want to hide this from ordinary Authenticated Users, but want it available to my Site Contributor role users, so they can review and then assign tags to user-created nodes. I've tried overriding the Node Add/Edit form in Panels 3 by creating a panel variant especially for Authenticated Users, which would exclude the Taxonomy field. However, the Taxonomy field is bundled in with the "General Form" controls - without showing this, I don't get the Title and Body fields. Is there a way I can either include the Title and Body fields without Taxonomy, OR hide just the Taxonomy field when the authenticated user role creates a node. I realise there's a CCK field which might be able to help me out here, but how do I tie that to the Taxonomy module? Any help gratefully received.

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• Convert wife/husband/partner to a programmer.

  - by Stefan

  originally posted by Stefan: How many of you have had the thought of educate your partner and invite him/her to the beautiful world of programming? I once started to give my wife lessons twice a week, It was a competition between me and another programmer, we thought it would be nice to have our wives understand why we work as programmers and also have it as a hobby sitting all night long. Maybe we could get our wives to feel the power too? After a couple of months my wife didn't like the idea any more, it was too hard to understand she thought, same for my friends wife. So now we are thinking of some project that would be too fun for our wives to turn down just to get the spirit up again. It would be nice to hand over a project to my wife, "Can you debug this for me, please? There are some strange error on module xxx." :) Maybe I'm crazy, what do you think?

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• Subversion terminology. Difference between projects, modules and root directories

  - by aioobe

  I'm setting up a repository for me and some colleagues. I have a subversion repository at hand, and all required rights. The usual directory-skeleton has been set up for me (branches, tags and trunk). Now I'm about to create a directory for me and my colleagues to put our files in. I'm quite sure the right place to put it is in trunk. Now here and there in tutorials, I see terms like "modules" and "projects" such as in Checking Out a Project - svn checkout svn checkout http://host_name/svn_dir/repository_name/project/trunk proj Is proj in the above line some glorified directory in trunk? Should I do something else than a checkout on trunk, mkdir and then commit when creating a directory for me and my colleagues? Whats the difference between a project, a directory in trunk and a module?

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• include_once fails!

  - by user220201

  Hi, I am new to php. I thought I knew enough but apparently do not. I am trying to use the OAuth.php from code.google.com. So I include OAuth.php in my code. Here is my php file - index.php <?php print 'Hello1'; include 'test.php'; print 'Hello2'; include 'OAuth.php'; print 'Hello3'; ?> Here test.php, OAuth.php and index.php are all in the same directory. Amazingly enough, I see Hello1 and Hello2 but not Hello3. What am I missing. Its driving me crazy. Any help is greatly greatly appreciated. I am using php5 with apache 2.2 and also have the oauth.so module installed and loaded from php.net. SV

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• MySQLdb not INSERTING, _mysql does fine.

  - by Mad_Casual

  Okay, I log onto the MySQL command-line client as root. I then open or otherwise run a python app using the MySQLdb module as root. When I check the results using python (IDLE), everything looks fine. When I use the MySQL command-line client, no INSERT has occurred. If I change things around to _mysql instead of MySQLdb, everything works fine. I'd appreciate any clarification(s). "Works" until IDLE/Virtual machine is reset: <pre><code>import MySQLdb db = MySQLdb.connect(user='root', passwd='*******',db='test') cursor = db.cursor() cursor.execute("""INSERT INTO test VALUES ('somevalue');""",)</code></end> Works: <pre><code>import _mysql db = _mysql.connect(user='root', passwd='*******',db='test') db.query("INSERT INTO test VALUES ('somevalue');")</code></end> System info: Intel x86 WinXP Python 2.5 MySQL 5.1.41 MySQL-Python 1.2.2

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• Compiling SWIG library for Ruby on Mac OS X fails

  - by Stefan Schmidt

  I tried to compile the following SWIG library for Ruby and everything went smooth until the last step. /* File : computation.c */ int add(int x, int y) { return x + y; } /* File: computation.i */ %module computation extern int add(int x, int y); $ swig -ruby computation.i $ gcc -c computation.c $ gcc -c computation_wrap.c -I/opt/local/lib/ruby/1.8/i686-darwin10 $ gcc -shared computation.o computation_wrap.o -o computation.so Undefined symbols: "_rb_str_cat", referenced from: _Ruby_Format_TypeError in computation_wrap.o "_rb_exc_new3", referenced from: _SWIG_Ruby_ExceptionType in computation_wrap.o "_rb_define_class_under", referenced from: _SWIG_Ruby_define_class in computation_wrap.o _SWIG_Ruby_define_class in computation_wrap.o [...] ld: symbol(s) not found collect2: ld returned 1 exit status My configuration: $ sw_vers ProductName: Mac OS X ProductVersion: 10.6.3 BuildVersion: 10D575 $ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin10] $ swig -version SWIG Version 1.3.40 Compiled with /usr/bin/g++-4.2 [i386-apple-darwin10.3.0] $ gcc --version i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5646)

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• How should I do custom sort in Python 3?

  - by S.Mark

  In Python 2.x, I could pass custom function to sorted and .sort functions >>> x=['kar','htar','har','ar'] >>> >>> sorted(x) ['ar', 'har', 'htar', 'kar'] >>> >>> sorted(x,cmp=customsort) ['kar', 'htar', 'har', 'ar'] Because, in My language, consonents are comes with this order "k","kh",....,"ht",..."h",...,"a" But In Python 3.x, looks like I could not pass cmp keyword >>> sorted(x,cmp=customsort) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'cmp' is an invalid keyword argument for this function Is there any alternatives or should I write my own sorted function too?

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