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• cPickle ImportError: No module named multiarray

  - by Rafal

  Hello, I'm using cPickle to save my Database into file. The code looks like that: def Save_DataBase(): import cPickle from scipy import * from numpy import * a=Results.VersionName #filename='D:/results/'+a[a.find('/')+1:-a.find('/')-2]+Results.AssType[:3]+str(random.randint(0,100))+Results.Distribution+".lft" filename='D:/results/pppp.lft' plik=open(filename,'w') DataOutput=[[[DataBase.Arrays.Nodes,DataBase.Arrays.Links,DataBase.Arrays.Turns,DataBase.Arrays.Connectors,DataBase.Arrays.Zones], [DataBase.Nodes.Data,DataBase.Links.Data,DataBase.Turns.Data,DataBase.OrigConnectors.Data,DataBase.DestConnectors.Data,DataBase.Zones.Data], [DataBase.Nodes.DictionaryPy2Vis,DataBase.Links.DictionaryPy2Vis,DataBase.Turns.DictionaryPy2Vis,DataBase.OrigConnectors.DictionaryPy2Vis,DataBase.DestConnectors.DictionaryPy2Vis,DataBase.Zones.DictionaryPy2Vis], [DataBase.Nodes.DictionaryVis2Py,DataBase.Links.DictionaryVis2Py,DataBase.Turns.DictionaryVis2Py,DataBase.OrigConnectors.DictionaryVis2Py,DataBase.DestConnectors.DictionaryVis2Py,DataBase.Zones.DictionaryVis2Py], [DataBase.Paths.List]],[Results.VersionName,Results.noZones,Results.noNodes,Results.noLinks,Results.noTurns,Results.noTrips, Results.Times.VersionLoad,Results.Times.GetData,Results.Times.GetCoords,Results.Times.CrossTheTime,Results.Times.Plot_Cylinder, Results.AssType,Results.AssParam,Results.tStart,Results.tEnd,Results.Distribution,Results.tVector]] cPickle.dump(DataOutput, plik, protocol=0) plik.close()` And it works fine. Most of my Database rows are lists of a lists, vecor-like, or array-like data sets. But now when I input data, an error occurs: def Load_DataBase(): import cPickle from scipy import * from numpy import * filename='D:/results/pppp.lft' plik= open(filename, 'rb') """ first cPickle load approach """ A= cPickle.load(plik) """ fail """ """ Another approach - data format exact as in Output step above , also fails""" [[[DataBase.Arrays.Nodes,DataBase.Arrays.Links,DataBase.Arrays.Turns,DataBase.Arrays.Connectors,DataBase.Arrays.Zones], [DataBase.Nodes.Data,DataBase.Links.Data,DataBase.Turns.Data,DataBase.OrigConnectors.Data,DataBase.DestConnectors.Data,DataBase.Zones.Data], [DataBase.Nodes.DictionaryPy2Vis,DataBase.Links.DictionaryPy2Vis,DataBase.Turns.DictionaryPy2Vis,DataBase.OrigConnectors.DictionaryPy2Vis,DataBase.DestConnectors.DictionaryPy2Vis,DataBase.Zones.DictionaryPy2Vis], [DataBase.Nodes.DictionaryVis2Py,DataBase.Links.DictionaryVis2Py,DataBase.Turns.DictionaryVis2Py,DataBase.OrigConnectors.DictionaryVis2Py,DataBase.DestConnectors.DictionaryVis2Py,DataBase.Zones.DictionaryVis2Py], [DataBase.Paths.List]],[Results.VersionName,Results.noZones,Results.noNodes,Results.noLinks,Results.noTurns,Results.noTrips, Results.Times.VersionLoad,Results.Times.GetData,Results.Times.GetCoords,Results.Times.CrossTheTime,Results.Times.Plot_Cylinder, Results.AssType,Results.AssParam,Results.tStart,Results.tEnd,Results.Distribution,Results.tVector]]= cPickle.load(plik)` Error is (in both cases): A= cPickle.load(plik) ImportError: No module named multiarray Any Ideas? PS.

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• Django 1.2 + South 0.7 + django-annoying's AutoOneToOneField leads to TypeError: 'LegacyConnection'

  - by konrad

  I'm using Django 1.2 trunk with South 0.7 and an AutoOneToOneField copied from django-annoying. South complained that the field does not have rules defined and the new version of South no longer has an automatic field type parser. So I read the South documentation and wrote the following definition (basically an exact copy of the OneToOneField rules): rules = [ ( (AutoOneToOneField), [], { "to": ["rel.to", {}], "to_field": ["rel.field_name", {"default_attr": "rel.to._meta.pk.name"}], "related_name": ["rel.related_name", {"default": None}], "db_index": ["db_index", {"default": True}], }, ) ] from south.modelsinspector import add_introspection_rules add_introspection_rules(rules, ["^myapp"]) Now South raises the following error when I do a schemamigration. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "django/core/management/__init__.py", line 438, in execute_manager utility.execute() File "django/core/management/__init__.py", line 379, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "django/core/management/base.py", line 196, in run_from_argv self.execute(*args, **options.__dict__) File "django/core/management/base.py", line 223, in execute output = self.handle(*args, **options) File "South-0.7-py2.6.egg/south/management/commands/schemamigration.py", line 92, in handle (k, v) for k, v in freezer.freeze_apps([migrations.app_label()]).items() File "South-0.7-py2.6.egg/south/creator/freezer.py", line 33, in freeze_apps model_defs[model_key(model)] = prep_for_freeze(model) File "South-0.7-py2.6.egg/south/creator/freezer.py", line 65, in prep_for_freeze fields = modelsinspector.get_model_fields(model, m2m=True) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 322, in get_model_fields args, kwargs = introspector(field) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 271, in introspector arg_defs, kwarg_defs = matching_details(field) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 187, in matching_details if any([isinstance(field, x) for x in classes]): TypeError: 'LegacyConnection' object is not iterable Is this related to a recent change in Django 1.2 trunk? How do I fix this? I use this field as follows: class Bar(models.Model): foo = AutoOneToOneField("foo.Foo", primary_key=True, related_name="bar") For reference the field code from django-tagging: class AutoSingleRelatedObjectDescriptor(SingleRelatedObjectDescriptor): def __get__(self, instance, instance_type=None): try: return super(AutoSingleRelatedObjectDescriptor, self).__get__(instance, instance_type) except self.related.model.DoesNotExist: obj = self.related.model(**{self.related.field.name: instance}) obj.save() return obj class AutoOneToOneField(OneToOneField): def contribute_to_related_class(self, cls, related): setattr(cls, related.get_accessor_name(), AutoSingleRelatedObjectDescriptor(related))

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• Parse html and find data in the html

  - by Dan.StackOverflow

  Hi all. I am trying to use html5lib to parse an html page in to something I can query with xpath. html5lib has close to zero documentation and I've spent too much time trying to figure this problem out. Ultimate goal is to pull out the second row of a table: <html> <table> <tr><td>Header</td></tr> <tr><td>Want This</td></tr> </table> </html> so lets try it: >>> doc = html5lib.parse('<html><table><tr><td>Header</td></tr><tr><td>Want This</td> </tr></table></html>', treebuilder='lxml') >>> doc <lxml.etree._ElementTree object at 0x1a1c290> that looks good, lets see what else we have: >>> root = doc.getroot() >>> print(lxml.etree.tostring(root)) <html:html xmlns:html="http://www.w3.org/1999/xhtml"><html:head/><html:body><html:table><html:tbody><html:tr><html:td>Header</html:td></html:tr><html:tr><html:td>Want This</html:td></html:tr></html:tbody></html:table></html:body></html:html> LOL WUT? seriously. I was planning on using some xpath to get at the data I want, but that doesn't seem to work. So what can I do? I am willing to try different libraries and approaches.

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• Extending Programming Languages [closed]

  - by chpwn

  I'm a fan of clean code.

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• <?xml version=“1.0” encoding=“UTF-8”?> not <?xml version='1.0' encoding='UTF-8'?>

  - by user2446702

  I am using lxml with tree.write(xmlFileOut, pretty_print = True, xml_declaration = True, encoding='UTF-8' to write out my opened and edited xml file, but I absolutely need to have the xml declaration as <?xml version=“1.0” encoding=“UTF-8”?> and NOT <?xml version='1.0' encoding='UTF-8'?> Now I know they are exactly the same when it comes to xml, but I am dealing with a very tricky customer who absolutely has to have " in the declaration and not '. I have searched everywhere but can't find the answer. Could I create it and add it in myself to the head of the xml somehow? Could I tell lxml that this is what I need as an xml declaration?

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• Customizing Django form widgets? - Django

  - by RadiantHex

  Hi folks, I'm having a little problem here! I have discovered the following as being the globally accepted method for customizing Django admin field. from django import forms from django.utils.safestring import mark_safe class AdminImageWidget(forms.FileInput): """ A ImageField Widget for admin that shows a thumbnail. """ def __init__(self, attrs={}): super(AdminImageWidget, self).__init__(attrs) def render(self, name, value, attrs=None): output = [] if value and hasattr(value, "url"): output.append(('<a target="_blank" href="%s">' '<img src="%s" style="height: 28px;" /></a> ' % (value.url, value.url))) output.append(super(AdminImageWidget, self).render(name, value, attrs)) return mark_safe(u''.join(output)) I need to have access to other field of the model in order to decide how to display the field! For example: If I am keeping track of a value, let us call it "sales". If I wish to customize how sales is displayed depending on another field, let us call it "conversion rate". I have no obvious way of accessing the conversion rate field when overriding the sales widget! Any ideas to work around this would be highly appreciated! Thanks :)

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• Facebook connect displaying invite friends dialog and closing on completion

  - by Dougnukem

  I'm trying to create a Facebook Connect application that displays a friend invite dialog within the page using Facebook's Javascript API (through a FBMLPopupDialog). The trouble is to display a friend invite dialog you use a multi-friend form which requires an action="url" attribute that represents the URL to redirect your page to when the user completes or skips the form. The problem is that I want to just close the FBMLPopupDialog (the same behavior as if the user just hit the 'X' button on the popup dialog). The best I can do is redirect the user back to the page they were on basically a reload but they lose all AJAX/Flash application state. I'm wondering if any Facebook Connect developers have run into this issue and have a good way to simply display a friend invite "lightbox" dialog within their website where they don't want to "refresh" or "redirect" when the user finishes. The facebook connect JS API provides a FB.Connect.inviteConnectUsers, which provides a nice dialog but only connects existing users of your application who also have a Facebook account and haven't connected. http://bugs.developers.facebook.com/show%5Fbug.cgi?id=4916 function fb_inviteFriends() { //Invite users log("Inviting users..."); FB.Connect.requireSession( function() { //Connect succes var uid = FB.Facebook.apiClient.get_session().uid; log('FB CONNECT SUCCESS: ' + uid); //Invite users log("Inviting users..."); //Update server with connected account updateAccountFacebookUID(); var fbml = fb_getInviteFBML() ; var dialog = new FB.UI. FBMLPopupDialog("Weblings Invite", fbml) ; //dialog.setFBMLContent(fbml); dialog.setContentWidth(650); dialog.setContentHeight(450); dialog.show(); }, //Connect cancelled function() { //User cancelled the connect log("FB Connect cancelled:"); } ); } function fb_getInviteFBML() { var uid = FB.Facebook.apiClient.get_session().uid; var fbml = ""; fbml = '<fb:fbml>\n' + '<fb:request-form\n'+ //Redirect back to this page ' action="'+ document.location +'"\n'+ ' method="POST"\n'+ ' invite="true"\n'+ ' type="Weblings Invite"\n' + ' content="I need your help to discover all the Weblings and save the Internet! WebWars: Weblings is a cool new game where we can collect fantastic creatures while surfing our favorite websites. Come find the missing Weblings with me!'+ //Callback the server with the appropriate Webwars Account URL ' <fb:req-choice url=\''+ WebwarsFB.WebwarsAccountServer +'/SplashPage.aspx?action=ref&reftype=Facebook' label=\'Check out WebWars: Weblings\' />"\n'+ '>\n'+ ' <fb:multi-friend-selector\n'+ ' rows="2"\n'+ ' cols="4"\n'+ ' bypass="Cancel"\n'+ ' showborder="false"\n'+ ' actiontext="Use this form to invite your friends to connect with WebWars: Weblings."/>\n'+ ' </fb:request-form>'+ ' </fb:fbml>'; return fbml; }

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• Using M2Crypto to save and load X509 certs in pem files

  - by Brock Pytlik

  I would expect that if I have a X509 cert as an object in memory, saved it as a pem file, then loaded it back in, I would end up with the same cert I started with. This seems not to be the case however. Let's call the original cert A, and the cert loaded from the pem file B. A.as_text() is identical to B.as_text(), but A.as_pem() differs from B.as_pem(). To say the least, I'm confused by this. As a side note, if A has been signed by another entity C, then A will verify against C's cert, but B will not. I've put together a tiny sample program to demonstrate what I'm seeing. When I run this, the second RuntimeError is raised. Thanks, Brock #!/usr/bin/python2.6 import M2Crypto as m2 import time cur_time = m2.ASN1.ASN1_UTCTIME() cur_time.set_time(int(time.time()) - 60*60*24) expire_time = m2.ASN1.ASN1_UTCTIME() # Expire certs in 1 hour. expire_time.set_time(int(time.time()) + 60 * 60 * 24) cs_rsa = m2.RSA.gen_key(1024, 65537, lambda: None) cs_pk = m2.EVP.PKey() cs_pk.assign_rsa(cs_rsa) cs_cert = m2.X509.X509() # These two seem the minimum necessary to make the as_text function call work # at all cs_cert.set_not_before(cur_time) cs_cert.set_not_after(expire_time) # This seems necessary to fill out the complete cert without errors. cs_cert.set_pubkey(cs_pk) # I've tried with the following set lines commented out and not commented. cs_name = m2.X509.X509_Name() cs_name.C = "US" cs_name.ST = "CA" cs_name.OU = "Fake Org CA 1" cs_name.CN = "www.fakeorg.dex" cs_name.Email = "[email protected]" cs_cert.set_subject(cs_name) cs_cert.set_issuer_name(cs_name) cs_cert.sign(cs_pk, md="sha256") orig_text = cs_cert.as_text() orig_pem = cs_cert.as_pem() print "orig_text:\n%s" % orig_text cs_cert.save_pem("/tmp/foo") tcs = m2.X509.load_cert("/tmp/foo") tcs_text = tcs.as_text() tcs_pem = tcs.as_pem() if orig_text != tcs_text: raise RuntimeError( "Texts were different.\nOrig:\n%s\nAfter load:\n%s" % (orig_text, tcs_text)) if orig_pem != tcs_pem: raise RuntimeError( "Pems were different.\nOrig:\n%s\nAfter load:\n%s" % (orig_pem, tcs_pem))

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• Reading excel files with xlrd

  - by snurre

  I'm having problems reading .xls files written by a Perl script which I have no control over. The files contain some formatting and line breaks within cells. filename = '/home/shared/testfile.xls' book = xlrd.open_workbook(filename) sheet = book.sheet_by_index(0) for rowIndex in xrange(1, sheet.nrows): row = sheet.row(rowIndex) This is throwing the following error: _locate_stream(Workbook): seen 0 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 20 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 172480= 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 172500 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 3 2 172520 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 173840= 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 173860 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 173880 1 1 1 1 1 1 1 1 Traceback (most recent call last): File "/home/shared/xlrdtest.py", line 5, in <module> book = xlrd.open_workbook(filename) File "/usr/local/lib/python2.7/site-packages/xlrd/__init__.py", line 443, in open_workbook ragged_rows=ragged_rows, File "/usr/local/lib/python2.7/site-packages/xlrd/book.py", line 84, in open_workbook_xls ragged_rows=ragged_rows, File "/usr/local/lib/python2.7/site-packages/xlrd/book.py", line 616, in biff2_8_load self.mem, self.base, self.stream_len = cd.locate_named_stream(qname) File "/usr/local/lib/python2.7/site-packages/xlrd/compdoc.py", line 393, in locate_named_stream d.tot_size, qname, d.DID+6) File "/usr/local/lib/python2.7/site-packages/xlrd/compdoc.py", line 421, in _locate_stream raise CompDocError("%s corruption: seen[%d] == %d" % (qname, s, self.seen[s])) xlrd.compdoc.CompDocError: Workbook corruption: seen[2] == 4 I'm not able to find any info about CompDocError or Workbook corruption, even less the seen[2] == 4 part.

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• Issue reading packets from a pcap file. dpkt

  - by Chris

  I am running the following test script to try to read packets from a sample .pcap file I have downloaded. import socket import dpkt import sys pcapReader = dpkt.pcap.Reader(file("test1.pcap", "rb")) for ts, data in pcapReader: ether = dpkt.ethernet.Ethernet(data) if ether.type != dpkt.ethernet.ETH_TYPE_IP: raise ip = ether.data src = socket.inet_ntoa(ip.src) dst = socket.inet_ntoa(ip.dst) print "%s -> %s" % (src, dst) For some reason, this is not being interpreted properly. When running it, I get KeyError: 138 module body in test.py at line 4 function __init__ in pcap.py at line 105 Program exited. Why is this? What's wrong?

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• Filtering rows withing Admin using a Queryset - Django

  - by RadiantHex

  Hi folks, I'm trying to find a way to filter down rows of objects within Django Admin, using a queryset. e.g. Person.objects.filter(Q(name='John')|Q(surname='Doe')) I'm finding quite complicated to figure out. Any ideas?

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• How to find/replace text in html while preserving html tags/structure

  - by vbfoobar

  I use regexps to transform text as I want, but I want to preserve the HTML tags. e.g. if I want to replace "stack overflow" with "stack underflow", this should work as expected: if the input is stack <sometag>overflow</sometag>, I must obtain stack <sometag>underflow</sometag> (i.e. the string substitution is done, but the tags are still there...

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• Suggested GA operators for a TSP problem?

  - by Mark

  I'm building a genetic algorithm to tackle the traveling salesman problem. Unfortunately, I hit peaks that can sustain for over a thousand generations before mutating out of them and getting better results. What crossover and mutation operators generally do well in this case?

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• How to ignore GUI as much as possible without rendering APP less GUI developer friendly

  - by pbernatchez

  The substance of an app is more important to me than its apperance, yet GUI always seems to dominate a disproportionate percentage of programmer time, development and target resource requirements/constraints. Ideally I'd like an application architecture that will permit me to develop an app using a lightweight reference GUI/kit and focus on non gui aspects to produce a quality app which is GUI enabled/friendly. I would want APP and the GUI to be sufficiently decoupled to maximize the ease for you GUI experts to plug the app into to some target GUI design/framework/context. e.g. targets such as: termcap GUI, web app GUI framework, desktop GUI, thin client GUI. In short: How do I mostly ignore the GUI, but avoid painting you into a corner when I don't even know who you are yet?

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• I/O error(socket error): [Errno 111] Connection refused

  - by Schitti

  I have a program that uses urllib to periodically fetch a url, and I see intermittent errors like : I/O error(socket error): [Errno 111] Connection refused. It works 90% of the time, but the othe r10% it fails. If retry the fetch immediately after it fails, it succeeds. I'm unable to figure out why this is so. I tried to see if any ports are available, and they are. Any debugging ideas? For additional info, the stack trace is: File "/usr/lib/python2.6/urllib.py", line 235, in retrieve fp = self.open(url, data) File "/usr/lib/python2.6/urllib.py", line 203, in open return getattr(self, name)(url) File "/usr/lib/python2.6/urllib.py", line 342, in open_http h.endheaders() File "/usr/lib/python2.6/httplib.py", line 868, in endheaders self._send_output() File "/usr/lib/python2.6/httplib.py", line 740, in _send_output self.send(msg) File "/usr/lib/python2.6/httplib.py", line 699, in send self.connect() File "/usr/lib/python2.6/httplib.py", line 683, in connect self.timeout) File "/usr/lib/python2.6/socket.py", line 512, in create_connection raise error, msg Edit - A google search isn't very helpful, what I got out of it is that the server I'm fetching from sometimes refuses connections, how can I verify its not a bug in my code and this is indeed the case?

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• Progress gauge in status bar, using Cody Precord's ProgressStatusBar

  - by MCXXIII

  Hi. I am attempting to create a progress gauge in the status bar for my application, and I'm using the example in Cody Precord's wxPython 2.8 Application Development Cookbook. I've reproduced it below. For now I simply wish to show the gauge and have it pulse when the application is busy, so I assume I need to use the Start/StopBusy() methods. Problem is, none of it seems to work, and the book doesn't provide an example of how to use the class. In the __init__ of my frame I create my status bar like so: self.statbar = status.ProgressStatusBar( self ) self.SetStatusBar( self.statbar ) Then, in the function which does all the work, I have tried things like: self.GetStatusBar().SetRange( 100 ) self.GetStatusBar().SetProgress( 0 ) self.GetStatusBar().StartBusy() self.GetStatusBar().Run() # work done here self.GetStatusBar().StopBusy() And several combinations and permutations of those commands, but nothing happens, no gauge is ever shown. The work takes several seconds, so it's not because the gauge simply disappears again too quickly for me to notice. I can get the gauge to show up by removing the self.prog.Hide() line from Precord's __init__ but it still doesn't pulse and simply disappears never to return once work has finished the first time. Here's Precord's class: class ProgressStatusBar( wx.StatusBar ): '''Custom StatusBar with a built-in progress bar''' def __init__( self, parent, id_=wx.ID_ANY, style=wx.SB_FLAT, name='ProgressStatusBar' ): super( ProgressStatusBar, self ).__init__( parent, id_, style, name ) self._changed = False self.busy = False self.timer = wx.Timer( self ) self.prog = wx.Gauge( self, style=wx.GA_HORIZONTAL ) self.prog.Hide() self.SetFieldsCount( 2 ) self.SetStatusWidths( [-1, 155] ) self.Bind( wx.EVT_IDLE, lambda evt: self.__Reposition() ) self.Bind( wx.EVT_TIMER, self.OnTimer ) self.Bind( wx.EVT_SIZE, self.OnSize ) def __del__( self ): if self.timer.IsRunning(): self.timer.Stop() def __Reposition( self ): '''Repositions the gauge as necessary''' if self._changed: lfield = self.GetFieldsCount() - 1 rect = self.GetFieldRect( lfield ) prog_pos = (rect.x + 2, rect.y + 2) self.prog.SetPosition( prog_pos ) prog_size = (rect.width - 8, rect.height - 4) self.prog.SetSize( prog_size ) self._changed = False def OnSize( self, evt ): self._changed = True self.__Reposition() evt.Skip() def OnTimer( self, evt ): if not self.prog.IsShown(): self.timer.Stop() if self.busy: self.prog.Pulse() def Run( self, rate=100 ): if not self.timer.IsRunning(): self.timer.Start( rate ) def GetProgress( self ): return self.prog.GetValue() def SetProgress( self, val ): if not self.prog.IsShown(): self.ShowProgress( True ) if val == self.prog.GetRange(): self.prog.SetValue( 0 ) self.ShowProgress( False ) else: self.prog.SetValue( val ) def SetRange( self, val ): if val != self.prog.GetRange(): self.prog.SetRange( val ) def ShowProgress( self, show=True ): self.__Reposition() self.prog.Show( show ) def StartBusy( self, rate=100 ): self.busy = True self.__Reposition() self.ShowProgress( True ) if not self.timer.IsRunning(): self.timer.Start( rate ) def StopBusy( self ): self.timer.Stop() self.ShowProgress( False ) self.prog.SetValue( 0 ) self.busy = False def IsBusy( self ): return self.busy

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• Running shell commands without a shell window

  - by aF

  With either subprocess.call or subprocess.Popen, executing a shell command makes a shell window quicky appear and disappear. How can I run the shell command without the shell window?

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• Validating ModelChoiceField in Django forms

  - by Andrey

  I'm trying to validate a form containing a ModelChoiceField: state = forms.ModelChoiceField(queryset=State.objects.all(), empty_label=None) When it is used in normal circumstances, everything goes just fine. But I'd like to protect the form from the invalid input. It's pretty obvious that I must get forms.ValidationError when I put invalid value in this field, isn't it? But if I try to submit a form with a value 'invalid' in 'state' field, I get ValueError: invalid literal for int() with base 10: 'invalid' and not the expected forms.ValidationError. What should I do? I tried to place a def clean_state(self) to check this field but that didn't work plus I don't think this is a good solution, there must be something more simple but I just missed that.

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• Django templates crashes with no sense

  - by user233323

  Hello I'm trying to use google visualization API along with django templates system. I got an error that don't know how to fix. The error is the following: invalid_block_tag raise self.error(token, "Invalid block tag: '%s'" % command) django.template.TemplateSyntaxError: Invalid block tag: 'endfor' The code is: function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('date', 'time'); data.addColumn('number', 'x'); data.addColumn('number', 'y'); data.addColumn('number', 'z'); data.addRows([ {% for d in datos &} [new Date({{d.instante|date:"Y, m, d, H, i, s"}}), {{d.x}}, {{d.y}}, {{d.z}}] {% if not forloop.last %},{% endif %} ]); {% endfor %} var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div')); chart.draw(data, {displayAnnotations: true}); } Thanks you all!

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• Pandas Dataframe to JSON File with Separate Records

  - by Chris

  I'm attempting to dump data from a Pandas Dataframe into a JSON file to import into MongoDB. The format I require in a file has JSON records on each line of the form: {<column 1>:<value>,<column 2>:<value>,...,<column N>:<value>} df.to_json(,orient='records') gets close to the result but all the records are dumped within a single JSON array. Any thoughts on an efficient way to get this result from a dataframe? UPDATE: The best solution I've come up with is the following: dlist = df.to_dict('records') dlist = [json.dumps(record)+"\n" for record in dlist] open('data.json','w').writelines(dlist)

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• Hierarchical checked tree control with tri-state checkboxes in wxPython?

  - by Noah

  As per the title, is this possible? By tri-state, I mean the parent node is: Checked if all children are checked Unchecked if all children are unchecked Grey/Filled if some children are checked I have used them previously in C# but cannot find an equivalent control/implementation for wxPython.

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• GAE Datastore Put()

  - by Ivan Slaughter

  def post(self): update = self.request.get('update') if users.get_current_user(): if update: personal = db.GqlQuery("SELECT * FROM Personal WHERE __key__ = :1", db.Key(update)) personal.name = self.request.get('name') personal.gender = self.request.get('gender') personal.mobile_num = self.request.get('mobile_num') personal.birthdate = int(self.request.get('birthdate')) personal.birthplace = self.request.get('birthplace') personal.address = self.request.get('address') personal.geo_pos = self.request.get('geo_pos') personal.info = self.request.get('info') photo = images.resize(self.request.get('img'), 0, 80) personal.photo = db.Blob(photo) personal.put() self.redirect('/admin/personal') else: personal= Personal() personal.name = self.request.get('name') personal.gender = self.request.get('gender') personal.mobile_num = self.request.get('mobile_num') personal.birthdate = int(self.request.get('birthdate')) personal.birthplace = self.request.get('birthplace') personal.address = self.request.get('address') personal.geo_pos = self.request.get('geo_pos') personal.info = self.request.get('info') photo = images.resize(self.request.get('img'), 0, 80) personal.photo = db.Blob(photo) personal.put() self.redirect('/admin/personal') else: self.response.out.write('I\'m sorry, you don\'t have permission to add this LP Personal Data.') Should this will update the existing record if the 'update' is querystring containing key datastore key. I try this but keep adding new record/entity. Please give me some sugesstion to correctly updating the record/entity. Correction? : def post(self): update = self.request.get('update') if users.get_current_user(): if update: personal = Personal.get(db.Key(update)) personal.name = self.request.get('name') personal.gender = self.request.get('gender') personal.mobile_num = self.request.get('mobile_num') personal.birthdate = int(self.request.get('birthdate')) personal.birthplace = self.request.get('birthplace') personal.address = self.request.get('address') personal.geo_pos = self.request.get('geo_pos') personal.info = self.request.get('info') photo = images.resize(self.request.get('img'), 0, 80) personal.photo = db.Blob(photo) personal.put() self.redirect('/admin/personal') else: personal= Personal() personal.name = self.request.get('name') personal.gender = self.request.get('gender') personal.mobile_num = self.request.get('mobile_num') personal.birthdate = int(self.request.get('birthdate')) personal.birthplace = self.request.get('birthplace') personal.address = self.request.get('address') personal.geo_pos = self.request.get('geo_pos') personal.info = self.request.get('info') photo = images.resize(self.request.get('img'), 0, 80) personal.photo = db.Blob(photo) personal.put() self.redirect('/admin/personal') else: self.response.out.write('I\'m sorry, you don\'t have permission to add this LP Personal Data.')

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• Wait for a single RabbitMQ message with a timeout

  - by Evgeny

  I'd like to send a message to a RabbitMQ server and then wait for a reply message (on a "reply-to" queue). Of course, I don't want to wait forever in case the application processing these messages is down - there needs to be a timeout. It sounds like a very basic task, yet I can't find a way to do this. I've now run into this problem with both py-amqplib and the RabbitMQ .NET client. The best solution I've got so far is to poll using basic_get with sleep in-between, but this is pretty ugly: def _wait_for_message_with_timeout(channel, queue_name, timeout): slept = 0 sleep_interval = 0.1 while slept < timeout: reply = channel.basic_get(queue_name) if reply is not None: return reply time.sleep(sleep_interval) slept += sleep_interval raise Exception('Timeout (%g seconds) expired while waiting for an MQ response.' % timeout) Surely there is some better way?

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• Django ORM: Ordering w/ aggregate functions — None special treatment

  - by deno

  Hi, I'm doing query like that: SomeObject.objects.annotate(something=Avg('something')).order_by(something).all() Now, I normally have an aggregate field in my model that I use with Django signals to keep in sync, however in this case perfomance isn't an issue so I thought I'd keep it simple and just use subqueries. This approach, however, presented an unexpected issue: It all works grate if aggregate function results are like this: [5.0, 4.0, 6.0 … (etc, just numbers)] However if you mix in some Nones than it's being ordered like this: [None, 5.0, 4.0 …] The issue is that None has higher value than any number, while it should have value at most of 0. I'm using PostgreSQL and haven't tested w/ other DBs. I haven't actually checked what query is generated etc. I worked it around by just sorting in memory: sorted(…, key=lambda _:_.avg_rating if _.avg_rating is not None else 0) So I'm just curious if you know a way to do it w/ just Django ORM. Perhaps .where? or something… Kind regards

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• Does Django cache url regex patterns somehow?

  - by Emre Sevinç

  I'm a Django newbie who needs help: Even though I change some urls in my urls.py I keep on getting the same error message from Django. Here is the relevant line from my settings.py: ROOT_URLCONF = 'mydjango.urls' Here is my urls.py: from django.conf.urls.defaults import * # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', # Example: # (r'^mydjango/', include('mydjango.foo.urls')), # Uncomment the admin/doc line below and add 'django.contrib.admindocs' # to INSTALLED_APPS to enable admin documentation: #(r'^admin/doc/', include(django.contrib.admindocs.urls)), # (r'^polls/', include('mydjango.polls.urls')), (r'^$', 'mydjango.polls.views.homepage'), (r'^polls/$', 'mydjango.polls.views.index'), (r'^polls/(?P<poll_id>\d+)/$', 'mydjango.polls.views.detail'), (r'^polls/(?P<poll_id>\d+)/results/$', 'mydjango.polls.views.results'), (r'^polls/(?P<poll_id>\d+)/vote/$', 'mydjango.polls.views.vote'), (r'^polls/randomTest1/', 'mydjango.polls.views.randomTest1'), (r'^admin/', include(admin.site.urls)), ) So I expect that whenever I visit http://mydjango.yafz.org/polls/randomTest1/ the mydjango.polls.views.randomTest1 function should run because in my polls/views.py I have the relevant function: def randomTest1(request): # mainText = request.POST['mainText'] return HttpResponse("Default random test") However I keep on getting the following error message: Page not found (404) Request Method: GET Request URL: http://mydjango.yafz.org/polls/randomTest1 Using the URLconf defined in mydjango.urls, Django tried these URL patterns, in this order: 1. ^$ 2. ^polls/$ 3. ^polls/(?P<poll_id>\d+)/$ 4. ^polls/(?P<poll_id>\d+)/results/$ 5. ^polls/(?P<poll_id>\d+)/vote/$ 6. ^admin/ 7. ^polls/randomTest/$ The current URL, polls/randomTest1, didn't match any of these. I'm surprised because again and again I check urls.py and there is no ^polls/randomTest/$ in it, but there is ^polls/randomTest1/' It seems like Django is somehow storing the previous contents of urls.py and I just don't know how to make my latest changes effective. Any ideas? Why do I keep on seeing some old version of regexes when I try to load that page even though I changed my urls.py?

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