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• Reliable and fast way to convert a zillion ODT files in PDF?

  - by Marco Mariani

  I need to pre-produce a million or two PDF files from a simple template (a few pages and tables) with embedded fonts. Usually, I would stay low level in a case like this, and compose everything with a library like ReportLab, but I joined late in the project. Currently, I have a template.odt and use markers in the content.xml files to fill with data from a DB. I can smoothly create the ODT files, they always look rigth. For the ODT to PDF conversion, I'm using openoffice in server mode (and PyODConverter w/ named pipe), but it's not very reliable: in a batch of documents, there is eventually a point after which all the processed files are converted into garbage (wrong fonts and letters sprawled all over the page). Problem is not predictably reproducible (does not depend on the data), happens in OOo 2.3 and 3.2, in Ubuntu, XP, Server 2003 and Windows 7. My Heisenbug detector is ticking. I tried to reduce the size of batches and restarting OOo after each one; still, a small percentage of the documents are messed up. Of course I'll write about this on the Ooo mailing lists, but in the meanwhile, I have a delivery and lost too much time already. Where do I go? Completely avoid the ODT format and go for another template system. Suggestions? Anything that takes a few seconds to run is way too slow. OOo takes around a second and it sums to 15 days of processing time. I had to write a program for clustering the jobs over several clients. Keep the format but go for another tool/program for the conversion. Which one? There are many apps in the shareware or commercial repositories for windows, but trying each one is a daunting task. Some are too slow, some cannot be run in batch without buying it first, some cannot work from command line, etc. Open source tools tend not to reinvent the wheel and often depend on openoffice. Converting to an intermediate .DOC format could help to avoid the OOo bug, but it would double the processing time and complicate a task that is already too hairy. Try to produce the PDFs twice and compare them, discarding the whole batch if there's something wrong. Although the documents look equal, I know of no way to compare the binary content. Restart OOo after processing each document. it would take a lot more time to produce them it would lower the percentage of the wrong files, and make it very hard to identify them. Go for ReportLab and recreate the pages programmatically. This is the approach I'm going to try in a few minutes. Learn to properly format bulleted lists Thanks a lot.

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• How to get "paster request" to use config host value instead of localhost?

  - by mmartinez

  I'm trying to access my pylons application via cron job to send notifications to my users. The way I'm doing this is by running the application using something like: paster request myconfig.ini /maintenance/do In the actual controller I check for the "paste.command_request" to block public access. Everything works but the only problem is that within the notifications that I send to my users there is a link to their profile and the host is "localhost" which should instead be the domain name of the application. When the notifications are sent from within the served application (say, a user modifies their settings on the site) the notifications have the correct url. I am using mako to render my email tamplates and within the template I am using the "pylons.url" method with "qualified" set to "True". Am I missing something here? Thanks in advance.

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• Server authorization with MD5 and SQL.

  - by Charles

  I currently have a SQL database of passwords stored in MD5. The server needs to generate a unique key, then sends to the client. In the client, it will use the key as a salt then hash together with the password and send back to the server. The only problem is that the the SQL DB has the passwords in MD5 already. Therefore for this to work, I would have to MD5 the password client side, then MD5 it again with the salt. Am I doing this wrong, because it doesn't seem like a proper solution. Any information is appreciated.

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• Good way to edit the previous defined class in ipython

  - by leo

  Hi, I am wondering a good way to follow if i would like to redefine the members of a previous defined class in ipython. say : I have defined a class intro like below, and later i want to redefine part of the function definition _print_api. Any way to do that without retyping it . class intro(object): def _print_api(self,obj): def _print(key): if key.startswith('_'): return '' value = getattr(obj,key) if not hasattr(value,im_func): doc = type(valuee).__name__ else: if value.__doc__ is None: doc = 'no docstring' else: doc = value.__doc__ return ' %s :%s' %(key,doc) res = [_print(element) for element in dir(obj)] return '\n'.join([element for element in res if element != '']) def __get__(self,instance,klass): if instance is not None: return self._print(instance) else: return self._print_api(klass)

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• recommendation systems and the cold start problem

  - by Hellnar

  Hello, I am curious what are the methods / approaches to overcome the "cold start" problem where when a new user or an item enters the system, due to lack of info about this new entity, making recommendation is a problem. I can think of doing some prediction based recommendation (like gender, nationality and so on). Thanks

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• Django templates check condition

  - by Hulk

  If there are are no values in the table how can should the code be to indicate no name found else show the drop down box in the below code {% for name in dict.names %} <option value="{{name.id}}" {% for selected_id in selected_name %}{% ifequal name.id selected_id %} {{ selected }} {% endifequal %} {% endfor %}>{{name.firstname}}</option>{% endfor %} </select> Thanks..

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• Is Django a good choice for a security critical application?

  - by Andrei Savu

  Is Django a good choice for a security critical application? I am asking this because most of the online banking software is built using Java. Is there any real reason for this?

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• Iphone App Similar to the Talking Larry Application

  - by Zeeshan

  I am developing iphone application similar to the Talking Larry Application. I am facing an issue of Low Memory when i pre-load the animations into an NSMutable Array. If i do not pre-load the animations and load it into the Animation Images when the user touch the button then it takes Time and it play back the animation very Slow. And during video making it does not play the complete animations. How can i resolve this issue. I want to play back the animations similar to the Talking Larry app and do not want to get Low Memory Issue.

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• Convert or strip out "illegal" Unicode characters

  - by Oli

  I've got a database in MSSQL that I'm porting to SQLite/Django. I'm using pymssql to connect to the database and save a text field to the local SQLite database. However for some characters, it explodes. I get complaints like this: UnicodeDecodeError: 'ascii' codec can't decode byte 0x97 in position 1916: ordinal not in range(128) Is there some way I can convert the chars to proper unicode versions? Or strip them out?

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• why my code print this when i read and write..

  - by zjm1126

  def sss(request): handle=open('b.txt','r+') handle.write("I AM NEW FILE") var=handle.read(); return HttpResponse(var) urlpatterns = patterns('', ('^$',sss), ) 1.my b.txt has nothing 2.when i run my code ,it print this : I AM NEW FILE7 ??; ??x ??v1?pZ€0 ?????8N??p? ? ?) ? ?`16?? S6??? ?? ?@ ??p? {?€1?? V ?? @+ ? ? ? ? ???`? >?) ???@? Z!x`%?p??? ?????@?`7???`? ? ???1X ??????#????€0?(Q??H??P?#? ' ?(5 ?, 7??6H? 0??+?? k%8? `? ??"?` ?? ?0?? ?????/? ????8S1`?`????0? ?`????? ?? ?? ?????@]?HE,????+?+???p? @O??? ?? 37€P6?7?@= ?? ? ?+xP?x???70? ?????? €???€ h *??x ?1???€K ? ??8? ?? ?? ?`?? @?? ????? ?€????????8(?P? ??? p(0B????????? ???? P???? ?/?+?? 9 ? ? ????1???????? ; ?€??€? `?(??? ??+ ??0?? ????6 ?1?,??? {0??? X??€D ??&?€?`? ?H{ ???Xw???? ?? ??0?0?)€Q ?? ?? ? @?????? ?XA6??? O ?0 h ?? ??? ? ? j????0? 57?7@?H+ ?? ? `?? 18? ?P ??6?0????6?? ?a ?` ????????? pG8s???@ ? ? (, ? ( ?? ?+&?????7??!0[ 0m ????@??0?????? ??? p?pZ?+?@?€\1?? 0? ?? ??? ?€;?? ??`? ? ? ????*`7?@? 6 R ?????p?????00^#? ??8? h €,h? ? ??x+ ??€37????`+?P?? 1 ? ?????*??6?? ??h: ??83 ? ????0s ????? ?p? ??????" s?( ??x Q s l??x ndies". * If value is 1, cand{{ value|pluralize:"y,ies" }} displays "1 candy". * If value is 2, cand{{ value|pluralize:"y,ies" }} displays "2 candies". u ,i u i ( RE RG R5 R3 R4 ( R R< R t singular_suffixt plural_suffix( ( s? D:\Python25\lib\site-packages\django\template\defaultfilters.pyt pluralize4 s$ c C s d d k l } | | ? S( sD Takes a phone number and converts it in to its numerical equivalent.i????( t phone2numeric( Rc R ( R R why? thanks

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• Twisted DTLS connection

  - by estin

  How to implement dtls protocol using twisted with m2crypto (or pyopenssl)?

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• What does the term "blocking" mean in programming?

  - by Jackie

  Could someone provide a layman definition and use case?

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• How's my pygame code?

  - by Isaiah

  I'm still getting the hang of lots of things and thought I should post some code I made with pygame and get some feedback^^. I posted code here: http://urlvars.com/code/snippet/39272/my-bouncing-program http://urlvars.com/code/snippet/39273/my-bouncing-program-classes There's tome things that I implemented that I'm not using yet I just realized like a timer at the bottom of the main while loop. If my code isn't readable, I'm sorry, I'm self taught and this is the first code I've ever posted anywhere. By the way I made some variables that take the screensize and half it to find a point to spit out the squares, but when I try to use it, it makes a weird effect :/ Try switching the list i have in the newbyte() function with the halfScreen variable and see it freak out o.O thank you

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• Implications of not forwarding http:// to http://www.

  - by Michael Wilson

  Hi, my company is running IIS and DNN (I'm not a server guy, so color me ignorant), and I've read previous that you should either redirect your .http://www.mydomain to .http://mydomain or Vice Versa. Can anyone give me reasons to do this? (periods "prepended" to remove href) From what I understand, it's because search engines see those as two different 'sites' (Even when visiting one or the other, I can be logged into one but not the other). I also heard it can be a duplicate content problem, which search engines dislike. Just looking for some professional insight, will help me and others. Thanks!

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• Is it bad practice to extend the MongoEngine User document?

  - by Soviut

  I'm integrating MongoDB using MongoEngine. It provides auth and session support that a standard pymongo setup would lack. In regular django auth, it's considered bad practice to extend the User model since there's no guarantee it will be used correctly everywhere. Is this the case with mongoengine.django.auth? If it is considered bad practice, what is the best way to attach a separate user profile? Django has mechanisms for specifying an AUTH_PROFILE_MODULE. Is this supported in MongoEngine as well, or should I be manually doing the lookup?

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• Display additional data while iterating over a Django formset

  - by Jannis

  Hi, I have a list of soccer matches for which I'd like to display forms. The list comes from a remote source. matches = ["A vs. B", "C vs. D", "E vs, F"] matchFormset = formset_factory(MatchForm,extra=len(matches)) formset = MatchFormset() On the template side, I would like to display the formset with the according title (i.e. "A vs. B"). {% for form in formset.forms %} <fieldset> <legend>{{TITLE}}</legend> {{form.team1}} : {{form.team2}} </fieldset> {% endfor %} Now how do I get TITLE to contain the right title for the current form? Or asked in a different way: how do I iterate over matches with the same index as the iteration over formset.forms? Thanks for your input!

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• QAbstractTableModel as a model for one QTableView and few QListViews

  - by ??????

  community. Briefly. I wrote usual model over QAbstractTableModel and using it in usual way for QTableView. But I think I need to use some columns of this model for the few QListViews in QWizard to fill main table in the right way (for user). For example: use the column2 as the QListView's model on the page1 of the wizard; column3 for page2 for its QListView etc. Please, help me to understand just two things: Am I on the right way? If yes then how can I make it simply and explicitly?

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• Extracting attribute data from a raster

  - by user308827

  Hi, I have a raster file (basically 2D array) with close to a million points. I am trying to extract a circle from the raster (and all the points that lie within the circle. Using ArcGIS is exceedingly slow for this. Can anyone suggest any image processing library that is both easy to learn and powerful and quick enough for something like this? Thanks!

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• Sort and limit queryset by comment count and date using queryset.extra() (django)

  - by thornomad

  I am trying to sort/narrow a queryset of objects based on the number of comments each object has as well as by the timeframe during which the comments were posted. Am using a queryset.extra() method (using django_comments which utilizes generic foreign keys). I got the idea for using queryset.extra() (and the code) from here. This is a follow-up question to my initial question yesterday (which shows I am making some progress). Current Code: What I have so far works in that it will sort by the number of comments; however, I want to extend the functionality and also be able to pass a time frame argument (eg, 7 days) and return an ordered list of the most commented posts in that time frame. Here is what my view looks like with the basic functionality in tact: import datetime from django.contrib.comments.models import Comment from django.contrib.contenttypes.models import ContentType from django.db.models import Count, Sum from django.views.generic.list_detail import object_list def custom_object_list(request, queryset, *args, **kwargs): '''Extending the list_detail.object_list to allow some sorting. Example: http://example.com/video?sort_by=comments&days=7 Would get a list of the videos sorted by most comments in the last seven days. ''' try: # this is where I started working on the date business ... days = int(request.GET.get('days', None)) period = datetime.datetime.utcnow() - datetime.timedelta(days=int(days)) except (ValueError, TypeError): days = None period = None sort_by = request.GET.get('sort_by', None) ctype = ContentType.objects.get_for_model(queryset.model) if sort_by == 'comments': queryset = queryset.extra(select={ 'count' : """ SELECT COUNT(*) AS comment_count FROM django_comments WHERE content_type_id=%s AND object_pk=%s.%s """ % ( ctype.pk, queryset.model._meta.db_table, queryset.model._meta.pk.name ), }, order_by=['-count']).order_by('-count', '-created') return object_list(request, queryset, *args, **kwargs) What I've Tried: I am not well versed in SQL but I did try just to add another WHERE criteria by hand to see if I could make some progress: SELECT COUNT(*) AS comment_count FROM django_comments WHERE content_type_id=%s AND object_pk=%s.%s AND submit_date='2010-05-01 12:00:00' But that didn't do anything except mess around with my sort order. Any ideas on how I can add this extra layer of functionality? Thanks for any help or insight.

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• Munging non-printable characters to dots using string.translate()

  - by Jim Dennis

  So I've done this before and it's a surprising ugly bit of code for such a seemingly simple task. The goal is to translate any non-printable character into a . (dot). For my purposes "printable" does exclude the last few characters from string.printable (new-lines, tabs, and so on). This is for printing things like the old MS-DOS debug "hex dump" format ... or anything similar to that (where additional whitespace will mangle the intended dump layout). I know I can use string.translate() and, to use that, I need a translation table. So I use string.maketrans() for that. Here's the best I could come up with: filter = string.maketrans( string.translate(string.maketrans('',''), string.maketrans('',''),string.printable[:-5]), '.'*len(string.translate(string.maketrans('',''), string.maketrans('',''),string.printable[:-5]))) ... which is an unreadable mess (though it does work). From there you can call use something like: for each_line in sometext: print string.translate(each_line, filter) ... and be happy. (So long as you don't look under the hood). Now it is more readable if I break that horrid expression into separate statements: ascii = string.maketrans('','') # The whole ASCII character set nonprintable = string.translate(ascii, ascii, string.printable[:-5]) # Optional delchars argument filter = string.maketrans(nonprintable, '.' * len(nonprintable)) And it's tempting to do that just for legibility. However, I keep thinking there has to be a more elegant way to express this!

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• Stream a file to the HTTP response in Pylons

  - by Evgeny

  I have a Pylons controller action that needs to return a file to the client. (The file is outside the web root, so I can't just link directly to it.) The simplest way is, of course, this: with open(filepath, 'rb') as f: response.write(f.read()) That works, but it's obviously inefficient for large files. What's the best way to do this? I haven't been able to find any convenient methods in Pylons to stream the contents of the file. Do I really have to write the code to read a chunk at a time myself from scratch?

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• Looking for some thoughts on an image printing app

  - by Alex

  Hey All, Im looking for thoughts/advice. I have an upcoming project (all .net) that will require the following: pulls data once a day from an online service provider based on certain criteria. saves data locally for reference and reporting the data thats pulled will be used to create gift cards. So after the data is loaded, a process will run to generate "virtual cards" and send them to a network printer. Once printed, the system will updated the local data recording a successful or failed print. My initial thought was to create a windows service to pull the data...but then I couldnt decide how I was going to put a "virtual card" together and get it to print. Then I considered doing it as a WPF app. I figure that will give me access to the graphics and printing ability. Maybe neither of these are the right direction....Any ideas or thoughts would be greatly appreciated. Alex

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• Convert list to sequence of variables

  - by wtzolt

  I was wondering if this was possible... I have a sequence of variables that have to be assigned to a do.something (a, b) a and b variables accordingly. Something like this: # # Have a list of sequenced variables. list = 2:90 , 1:140 , 3:-40 , 4:60 # # "Template" on where to assign the variables from the list. do.something (a,b) # # Assign the variables from the list in a sequence with possibility of "in between" functions like print and time.sleep() added. do.something (2,90) time.sleep(1) print "Did something (%d,%d)" % (# # vars from list?) do.something (1,140) time.sleep(1) print "Did something (%d,%d)" % (# # vars from list?) do.something (3,-40) time.sleep(1) print "Did something (%d,%d)" % (# # vars from list?) do.something (4,60) time.sleep(1) print "Did something (%d,%d)" % (# # vars from list?) Any ideas?

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• socket.shutdown vs socket.close

  - by Jason Baker

  I recently saw a bit of code that looked like this (with sock being a socket object of course): sock.shutdown(socket.SHUT_RDWR) sock.close() What exactly is the purpose of calling shutdown on the socket and then closing it? If it makes a difference, this socket is being used for non-blocking IO.

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• cannot output a json encoded dict containing accents (noob inside)

  - by user296546

  Hi all, here is a fairly simple example wich is driving me nuts since a couple of days. Considering the following script: # -*- coding: utf-8 -* from json import dumps as json_dumps machaine = u"une personne émérite" print(machaine) output = {} output[1] = machaine jsonoutput = json_dumps(output) print(jsonoutput) The result of this from cli: une personne émérite {"1": "une personne \u00e9m\u00e9rite"} I don't understand why their such a difference between the two strings. i have been trying all sorts of encode, decode etc but i can't seem to be able to find the right way to do it. Does anybody has an idea ? Thanks in advance. Matthieu

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