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• PyQt4 Move QTableWidget row with widgets

  - by Guard

  I have the following method in my PyQt4 app. r2 is the number of row to move, and r1 is the position where it should be moved. To clarify: the table is filled with cellWidgets, not widgetItems. def move_row(self, r1, r2): tt = self.tableWidget tt.insertRow(r1) for c in range(tt.columnCount()): tt.setCellWidget(r1, c, tt.cellWidget(r2 + 1, c)) tt.removeRow(r2 + 1) # <--- ??? If I comment out the last line, it behaves as expected: the new row is inserted at position r1, it is filled with widgets from r2 (now it's r2+1), and the r2+1 row is empty. If I even hide this row, it behaves well, though it is not what I want (I have the rows numbered, and I don't want this hidden row to occupy the number). But if I remove the row, the widgets initially owned by it disappear. Looks like their ownership is taken on first placement, and is not changed after the move. Any ideas?

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• Python thread pool similar to the multiprocessing Pool?

  - by Martin

  Is there a Pool class for worker threads, similar to the multiprocessing module's Pool class? I like for example the easy way to parallelize a map function def long_running_func(p): c_func_no_gil(p) p = multiprocessing.Pool(4) xs = p.map(long_running_func, range(100)) however I would like to do it without the overhead of creating new processes. I know about the GIL. However, in my usecase, the function will be an IO-bound C function for which the python wrapper will release the GIL before the actual function call. Do I have to write my own threading pool?

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• Rails transaction: save data in multiple models.

  - by smotchkkiss

  my models class Auction belongs_to :item belongs_to :user, :foreign_key => :current_winner_id has_many :auction_bids end class User has_many :auction_bids end class AuctionBid belongs_to :user end current usage An item is displayed on the page, the user enters an amount and clicks bid. Controller code might look something like this: class MyController def bid @ab = AuctionBid.new(params[:auction_bid]) @ab.user = current_user if @ab.save render :json => {:response => 'YAY!'} else render :json => {:response => 'FAIL!'} end end end desired functionality This works great so far! However, I need to ensure a couple other things happen. @ab.auction.bid_count needs to be incremented by one. @ab.user.bid_count needs to be incremented by one @ab.auction.current_winner_id needs to be set to @ab.user_id That is, the User and the Auction associated with the AuctionBid need values updated as well in order for the AuctionBid#save to return true.

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• How come I get a timed-out when I try to download something off my own domain?

  - by alex

  def download(source_url): socket.setdefaulttimeout(10) agents = ['Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)','Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.1)','Microsoft Internet Explorer/4.0b1 (Windows 95)','Opera/8.00 (Windows NT 5.1; U; en)'] ree = urllib2.Request(source_url) ree.add_header('User-Agent',random.choice(agents)) resp = urllib2.urlopen(ree) htmlSource = resp.read() return htmlSource url = "http://myIP/details/?id=4" result_html = download(url) It shouldn't time out...even with the 10 second timeout..

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• How can I deal with No module named edit.editor ?

  - by Tomas Pajonk

  I am trying to follow the WingIDE tutorial on creating scripts in the IDE. This following example scripts always throws an error: import wingapi def test_script(test_str): app = wingapi.gApplication v = "Product info is: " + str(app.GetProductInfo()) v += "\nAnd you typed: %s" % test_str wingapi.gApplication.ShowMessageDialog("Test Message", v) Traceback (most recent call last): File "C:\Wing-pi\Scripts\test.py", line 1, in import wingapi File "C:\Program Files\Development\Wing IDE 3.1\bin\wingapi.py", line 18, in import edit.editor ImportError: No module named edit.editor Process terminated with an exit code of 1 I am launching the script in the Wing IDE as suggested by someone, but I keep getting the same result.

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• Django equivalent for latest entry for each user

  - by paul-ogrady

  Hi, I'm surprised this question hasn't come up. Couldn't find much on the web. Using Entry.objects.latest('created_at') I can recover the latest entry for all Entry objects, but say if I want the latest entry for each user? This is something similar to an SQL latest record query. But how do I achieve this using the ORM? Here is my approach I'm wondering if it is the most efficient way to do what I want. First I perform a sub query: Objects are grouped by user and the Max (latest) created_by field is returned for each user (created_at__max) I then filter Entry objects based on the results in the subquery and get the required objects. Entry.objects.filter(created_at__in=Entry.objects.values('user').annotate(Max('created_at')).values_list('created_at__max')) or using a manager: class UsersLatest(models.Manager): def get_query_set(self): return Super(UsersLatest,self).get_query_set().filter(created_at__in=self.model.objects.values('user').annotate(Max('created_at')).values_list('created_at__max')) Is there a more efficient way? possibly without sub query? Thanks, Paul

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• How to add a property to a module in boost::python?

  - by Checkers

  You can add a property to a class using a getter and a setter (in a simplistic case): class<X>("X") .add_property("foo", &X::get_foo, &X::set_foo); But how to add a property to a module itself (not a class)? There is scope().attr("globalAttr") = ??? something ??? and def("globalAttr", ??? something ???); I can add global functions and objects of my class using the above two ways, but can't seem to add properties the same way as in classes.

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• django objects.all() method issue

  - by xlione

  after I saved one item using MyModelClass.save() method of django in one view/page , at another view I use MyModelClass.objects.all() to list all items in MyModelClass but the newly added one always is missing at the new page. i am using django 1.1 i am using mysql middleware setting MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.locale.LocaleMiddleware', ) my model: class Company(models.Model): name = models.CharField(max_length=500) description = models.CharField(max_length=500,null=True) addcompany view def addcompany(request): if request.POST: form = AddCompanyForm(request.POST) if form.is_valid(): companyname = form.cleaned_data['companyname'] c = Company(name=companyname,description='description') c.save() return HttpResponseRedirect('/admins/') else: form = AddCompanyForm() return render_to_response('user/addcompany.html',{'form':form},context_instance=RequestContext(request)) after this page in another view i called this form in another view class CompanyForm(forms.Form): companies=((0,' '),) for o in CcicCompany.objects.all(): x=o.id,o.name companies+=(x,) company = forms.ChoiceField(choices=companies,label='Company Name') to list all companies but the recently added one is missing. The transaction should be successful, since after i do a apache server reboot , i can see the newly added company name Thanks for any help...

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• Error after installing scala plugin of netbeans

  - by ghedas

  I installed the scala plugin on my netbeans and followed the instruction of this page: http://wiki.netbeans.org/Scala68v1#Scala_Plugins_for_NetBeans_6.8_v1.x_.28RC2.29 but after it completed correctly step by step, when I make an empty project (Hello world!), the project has an error! The empty project is here: package scalaapplication1 object Main { /** * @param args the command line arguments */ def main(args: Array[String]): Unit = { println("Hello, world!") } } and the console error report is: ...\NetBeansProjects\ScalaApplication2\nbproject\build-impl.xml:403: The following error occurred while executing this line: ...\NetBeansProjects\ScalaApplication2\nbproject\build-impl.xml:236: scalac doesn't support the "fork" attribute Is there any suggestion about it?!

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• paperclip callbacks or simple processor?

  - by holden

  I wanted to run the callback after_post_process but it doesn't seem to work in Rails 3.0.1 using Paperclip 2.3.8. It gives an error: undefined method `_post_process_callbacks' for #<Class:0x102d55ea0> I want to call the Panda API after the file has been uploaded. I would have created my own processor for this, but as Panda handles the processing, and it can upload the files as well, and queue itself for an undetermined duration I thought a callback would do fine. But the callbacks don't seem to work in Rails3. after_post_process :panda_create def panda_create video = Panda::Video.create(:source_url => mp3.url.gsub(/[?]\d*/,''), :profiles => "f4475446032025d7216226ad8987f8e9", :path_format => "blah/1234") end I tried require and include for paperclip in my model but it didn't seem to matter. Anyideas?

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• django 'urlize' strings form tect just like twitter

  - by dana

  heyy there i want to parse a text,let's name it 'post', and 'urlize' some strings if they contain a particular character, in a particular position. my 'pseudocode' trial would look like that: def urlize(post) for string in post if string icontains ('#') url=(r'^searchn/$', searchn, name='news_searchn'), then apply url to the string return urlize(post) i want the function to return to me the post with the urlized strings, where necessary (just like twitter does). i don't understand: how can i parse a text, and search for certain strings? is there ok to make a function especially for 'urlizing' some strings? The function should return the entire post, no matter if it has such kind of strings. is there another way Django offers? Thank you

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• Python - compare nested lists and append matches to new list?

  - by Seafoid

  Hi, I wish to compare to nested lists of unequal length. I am interested only in a match between the first element of each sub list. Should a match exist, I wish to add the match to another list for subsequent transformation into a tab delimited file. Here is an example of what I am working with: x = [['1', 'a', 'b'], ['2', 'c', 'd']] y = [['1', 'z', 'x'], ['4', 'z', 'x']] match = [] def find_match(): for i in x: for j in y: if i[1] == j[1]: match.append(j) return match This results in a series of empty lists. Is it better to use tuples and/or tuples of tuples for the purposes of comparison? Any help is greatly appreciated. Regards, Seafoid.

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• Rails - operation outside of a rollback

  - by Brian Armstrong

  I have a before_create filter that checks if people are posting too many comments. If they are I want to flag their account. class Comment < ActiveRecord::Base before_create :check_rate_limit def check_rate_limit comments_in_last_minute = self.user.comments.count(:conditions => ["comments.created_at > ?", 1.minute.ago]) if comments_in_last_minute > 2 user.update_attribute :status, "suspended" return false end true end end The before filter returns false to stop the comment from being created. The problem is that this triggers a ROLLBACK which also undoes the changes I made to the user model. What's the correct pattern to accomplish this? Specifically: running a check each time an object is created and being able to edit another model if the check fails.

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• Appending empty query string param to the URL in Rails

  - by Termopetteri

  Is there a way to append something to the query string with no value set? I would like to see this kind of URL being generated: http://local/things?magic. What I'm looking for is when the user goes to http://local/other?magic then every URL in the generated page would contain magic in the end. Following code is almost a solution but it gives me http://local/things?magic=. There is an extra = that I don't want there. def default_url_options(options) if params.has_key?("magic") { :magic => "" } end end Setting { :magic => nil } will remove the magic entirely from the generated URLs.

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• How do I set a default page in Pylons?

  - by Evgeny

  I've created a new Pylons application and added a controller ("main.py") with a template ("index.mako"). Now the URL http://myserver/main/index works. How do I make this the default page, ie. the one returned when I browse to http://myserver/ ? I've already added a default route in routing.py: def make_map(): """Create, configure and return the routes Mapper""" map = Mapper(directory=config['pylons.paths']['controllers'], always_scan=config['debug']) map.minimization = False # The ErrorController route (handles 404/500 error pages); it should # likely stay at the top, ensuring it can always be resolved map.connect('/error/{action}', controller='error') map.connect('/error/{action}/{id}', controller='error') # CUSTOM ROUTES HERE map.connect('', controller='main', action='index') map.connect('/{controller}/{action}') map.connect('/{controller}/{action}/{id}') return map I've also deleted the contents of the public directory (except for favicon.ico), following the answer to http://stackoverflow.com/questions/1279403/default-route-doesnt-work Now I just get error 404. What else do I need to do to get such a basic thing to work?

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• How to customize flash message based on success or failure with Inherited Resources Rails plugin?

  - by wgpubs

  I'm using the inherited resources plugin in a 2.3.5 Rails application and was wondering how to change the flash[:notice] (or any other flash) based on the success OR failure in my create and update actions. So given the below, how do I add flash[:notice] = "All good" if success ... and flash[:notice] = "All bad" if failure? Thanks class ArticleController < InheritedResources::Base actions :show, :create, :update respond_to :html, :json before_filter :authorize_upsert, :only => [:create, :update] def create #init new game @article = Article.new set_article_attributes_from_app @article.is_published = params[:article_publish_to_web] || false @ article.game_source = @client_application create! do |success, failure| success.html {redirect_to(@article)} success.json {render :json => {:id=>@article.id, :created_at=>@article.created_at, :picture_urls=> @article.assets.map { |a| root_url.chop + a.photo.url}}} failure.html {render :action => "show"} failure.json {render :json=>@article.errors, :status => :unprocessable_entity} end end

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• How do I display two different objects in a search?

  - by JZ

  github url I am using a simple search that displays search results: @adds = Add.search(params[:search]) In addition to the search results I'm trying to utilize a method, nearbys(), which displays objects that are close in proximity to the search result. The following method displays objects which are close to 2, but it does not display object 2. How do I display object 2 in conjunction with the nearby objects? @adds = Add.find(2).nearbys(10) While the above code functions, when I use search, @adds = Add.search(params[:search]).nearbys(10) a no method error is returned, undefined methodnearbys' for Array:0x30c3278` How can I search the model for an object AND use the nearbys() method AND display all results returned? Model: def self.search(search) if search find(:all, :conditions => ['address LIKE ?', "%#{search}%"]) # where('address LIKE ?', "%#{search}") else find(:all) end end

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• Rails STI: SuperClass Model Methods called from SubClass

  - by Karl

  I would like a little confirmation that I'm doing this correctly. Using rails single table inheritance I have the following models and class method: class PhoneNumber < ActiveRecord::Base def self.qual?(number) klass = self klass.exists?(:phone_number => phone_number) end end class Bubba < PhoneNumber end class Rufus < PhoneNumber end Bubba.qual?("8005551212") Tests pass and everything seems to work properly in rails console. Just wanted to confirm that I'm not headed for future trouble by using self in the superclass PhoneNumber and using that to execute class methods on subclasses from the parent. Is there a better way?

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• How do I do this Database Model in Django?

  - by alex

  Django currently does not support the "Point" datatype in MySQL. That's why I created my own. class PointField(models.Field): def db_type(self): return 'Point' class Tag(models.Model): user = models.ForeignKey(User) utm = PointField() As you can see, this works, and syncdb creates the model fine. However, my current code calculates a length between two Points using raw SQL. cursor.execute("SELECT user_id FROM life_tag WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) < 55)... This says: Select where the length between the given point and the table point is less than 55. How can I do this with Django instead of RAW SQL? I don't want to do cursors and SELECT statements anymore. How can I modify the models.py in order to do this?

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• to_xml with :only and :methods

  - by Jake

  I'm calling to_xml on an ActiveRecord object with both :only and :methods parameters. The method that I'm including returns a collection for AR objects. This works fine without the :only param, but when that is added I just get the default to_s representation of my objects. i.e <author><books>#&lt;Book:0x107753228&gt;</books>\n</author> Any ideas? Update, here is the code: class Author < ActiveRecord::Base def books #this is a named scope products.by_type(:book) end end Author.to_xml(:methods => :books, :only => :id)

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• Splitting only long words in string

  - by owca

  I have some random string, let's say : s = "This string has some verylongwordsneededtosplit" I'm trying to write a function trunc_string(string, len) that takes string as argument to operate on and 'len' as the number of chars after long words will be splitted. The result should be something like that str = trunc_string(s, 10) str = "This string has some verylongwo rdsneededt osplit" For now I have something like this : def truncate_long_words(s, num): """Splits long words in string""" words = s.split() for word in words: if len(word) > num: split_words = list(words) After this part I have this long word as a list of chars. Now I need to : join 'num' chars together in some word_part temporary list join all word_parts into one word join this word with the rest of words, that weren't long enough to be splitted. Should I make it in somehow similar way ? : counter = 0 for char in split_words: word_part.append(char) counter = counter+1 if counter == num And here I should somehow join all the word_part together creating word and further on

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• python object AttributeError: type object 'Track' has no attribute 'title'

  - by ccwhite1

  I apologize if this is a noob question, but I can't seem to figure this one out. I have defined an object that defines a music track (NOTE: originally had the just ATTRIBUTE vs self.ATTRIBUTE. I edited those values in to help remove confusion. They had no affect on the problem) class Track(object): def __init__(self, title, artist, album, source, dest): """ Model of the Track Object Contains the followign attributes: 'Title', 'Artist', 'Album', 'Source', 'Dest' """ self.atrTitle = title self.atrArtist = artist self.atrAlbum = album self.atrSource = source self.atrDest = dest I use ObjectListView to create a list of tracks in a specific directory ....other code.... self.aTrack = [Track(sTitle,sArtist,sAlbum,sSource, sDestDir)] self.TrackOlv.AddObjects(self.aTrack) ....other code.... Now I want to iterate the list and print out a single value of each item list = self.TrackOlv.GetObjects() for item in list: print item.atrTitle This fails with the error AttributeError: type object 'Track' has no attribute 'atrTitle' What really confuses me is if I highlight a single item in the Object List View display and use the following code, it will correctly print out the single value for the highlighted item list = self.TrackOlv.GetSelectedObject() print list.atrTitle

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• how to lengthen the pause between the words with text-to-speech (pyTTS or SAPI5)

  - by Berry Tsakala

  Is it possible to extend the gap between spoken words when using text to speech with SAPI5 ? The problem is that esp. with some voices, the words are almost connected to each other, which makes the speech more difficult to understand. I'm using python and pyTTS module (on windows, since it's using SAPI) I tried to hook to the OnWord event and add a time.sleep() or tts.Pause(), but apparently even though all the events are caught, they are being processed only at the end of the spoken text, whether i'm using the sync or async flag. In this NON WORKING example, the sleep() method is executed only after the sentence is spoken: tts = pyTTS.Create() def f(x): tts.Pause() sleep(0.5) tts.Resume() tts.OnWord = f tts.Speak(text)

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• Capistrano configuration

  - by Eli

  I'm having some issues with variable scope with the capistrano-ext gem's multistage module. I currently have, in config/deploy/staging.rb. set(:settings) { YAML.load_file("config/deploy.yml")['staging'] } set :repository, settings["repository"] set :deploy_to, settings["deploy_to"] set :branch, settings["branch"] set :domain, settings["domain"] set :user, settings["user"] role :app, domain role :web, domain role :db, domain, :primary => true My config/deploy/production.rb file is similar. This doesn't seem very DRY. Ideally, I think I'd like everything to be in the deploy.rb file. If there were a variable set with the current stage, everything would be really clean. UPDATE: I found a solution. I defined this function in deploy.rb: def set_settings(params) params.each_pair do |k,v| set k.to_sym, v end if exists? :domain role :app, domain role :web, domain role :db, domain, :primary => true end end Then my staging.rb file is just set_settings(YAML.load_file("config/deploy.yml")['staging'])

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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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