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• 12c - Utl_Call_Stack...

  - by noreply(at)blogger.com (Thomas Kyte)

  Over the next couple of months, I'll be writing about some cool new little features of Oracle Database 12c - things that might not make the front page of Oracle.com.  I'm going to start with a new package - UTL_CALL_STACK.In the past, developers have had access to three functions to try to figure out "where the heck am I in my code", they were:dbms_utility.format_call_stackdbms_utility.format_error_backtracedbms_utility.format_error_stackNow these routines, while useful, were of somewhat limited use.  Let's look at the format_call_stack routine for a reason why.  Here is a procedure that will just print out the current call stack for us:ops$tkyte%ORA12CR1> create or replace  2  procedure Print_Call_Stack  3  is  4  begin  5    DBMS_Output.Put_Line(DBMS_Utility.Format_Call_Stack());  6  end;  7  /Procedure created.Now, if we have a package - with nested functions and even duplicated function names:ops$tkyte%ORA12CR1> create or replace  2  package body Pkg is  3    procedure p  4    is  5      procedure q  6      is  7        procedure r  8        is  9          procedure p is 10          begin 11            Print_Call_Stack(); 12            raise program_error; 13          end p; 14        begin 15          p(); 16        end r; 17      begin 18        r(); 19      end q; 20    begin 21      q(); 22    end p; 23  end Pkg; 24  /Package body created.When we execute the procedure PKG.P - we'll see as a result:ops$tkyte%ORA12CR1> exec pkg.p----- PL/SQL Call Stack -----  object      line  object  handle    number  name0x6e891528         4  procedure OPS$TKYTE.PRINT_CALL_STACK0x6ec4a7c0        10  package body OPS$TKYTE.PKG0x6ec4a7c0        14  package body OPS$TKYTE.PKG0x6ec4a7c0        17  package body OPS$TKYTE.PKG0x6ec4a7c0        20  package body OPS$TKYTE.PKG0x76439070         1  anonymous blockBEGIN pkg.p; END;*ERROR at line 1:ORA-06501: PL/SQL: program errorORA-06512: at "OPS$TKYTE.PKG", line 11ORA-06512: at "OPS$TKYTE.PKG", line 14ORA-06512: at "OPS$TKYTE.PKG", line 17ORA-06512: at "OPS$TKYTE.PKG", line 20ORA-06512: at line 1The bit in red above is the output from format_call_stack whereas the bit in black is the error message returned to the client application (it would also be available to you via the format_error_backtrace API call). As you can see - it contains useful information but to use it you would need to parse it - and that can be trickier than it seems.  The format of those strings is not set in stone, they have changed over the years (I wrote the "who_am_i", "who_called_me" functions, I did that by parsing these strings - trust me, they change over time!).Starting in 12c - we'll have structured access to the call stack and a series of API calls to interrogate this structure.  I'm going to rewrite the print_call_stack function as follows:ops$tkyte%ORA12CR1> create or replace 2  procedure Print_Call_Stack  3  as  4    Depth pls_integer := UTL_Call_Stack.Dynamic_Depth();  5    6    procedure headers  7    is  8    begin  9        dbms_output.put_line( 'Lexical   Depth   Line    Name' ); 10        dbms_output.put_line( 'Depth             Number      ' ); 11        dbms_output.put_line( '-------   -----   ----    ----' ); 12    end headers; 13    procedure print 14    is 15    begin 16        headers; 17        for j in reverse 1..Depth loop 18          DBMS_Output.Put_Line( 19            rpad( utl_call_stack.lexical_depth(j), 10 ) || 20                    rpad( j, 7) || 21            rpad( To_Char(UTL_Call_Stack.Unit_Line(j), '99'), 9 ) || 22            UTL_Call_Stack.Concatenate_Subprogram 23                       (UTL_Call_Stack.Subprogram(j))); 24        end loop; 25    end; 26  begin 27    print; 28  end; 29  /Here we are able to figure out what 'depth' we are in the code (utl_call_stack.dynamic_depth) and then walk up the stack using a loop.  We will print out the lexical_depth, along with the line number within the unit we were executing plus - the unit name.  And not just any unit name, but the fully qualified, all of the way down to the subprogram name within a package.  Not only that - but down to the subprogram name within a subprogram name within a subprogram name.  For example - running the PKG.P procedure again results in:ops$tkyte%ORA12CR1> exec pkg.pLexical   Depth   Line    NameDepth             Number-------   -----   ----    ----1         6       20      PKG.P2         5       17      PKG.P.Q3         4       14      PKG.P.Q.R4         3       10      PKG.P.Q.R.P0         2       26      PRINT_CALL_STACK1         1       17      PRINT_CALL_STACK.PRINTBEGIN pkg.p; END;*ERROR at line 1:ORA-06501: PL/SQL: program errorORA-06512: at "OPS$TKYTE.PKG", line 11ORA-06512: at "OPS$TKYTE.PKG", line 14ORA-06512: at "OPS$TKYTE.PKG", line 17ORA-06512: at "OPS$TKYTE.PKG", line 20ORA-06512: at line 1This time - we get much more than just a line number and a package name as we did previously with format_call_stack.  We not only got the line number and package (unit) name - we got the names of the subprograms - we can see that P called Q called R called P as nested subprograms.  Also note that we can see a 'truer' calling level with the lexical depth, we can see we "stepped" out of the package to call print_call_stack and that in turn called another nested subprogram.This new package will be a nice addition to everyone's error logging packages.  Of course there are other functions in there to get owner names, the edition in effect when the code was executed and more. See UTL_CALL_STACK for all of the details.

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• printing from crystal reports activex printcontrol gives needless error

  - by DaVinciCoder

  I've got an asp.net application running on a windows 2008 64 bit server that gives an error after printing a crystal report. The server has CR 2008 runtime sp2 installed and views fine. When printing from the print button of the CR viewer the print dialog appears and prints correctly but throws the following error message after printing. "An error occurred on the server. Printing will be stopped. Would you like to view the error information" there is a yes or no option that points to an empty html file called PrintControlError.html. Other then this issue I've got no other troubles.

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• Need IntelliJ IDEA 9 cheat sheet

  - by Roman

  I searched but couldn't find anything what I can print and put on the wall.

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• how to bind datasouce to the labels and pass parameter in XtraReport ?

  - by ahmed

  There's something that I don't get it yet in Xtrareport. I have to bind the datasource at runtime and also I have to assign the datasource to the labels programatically. Binding data at runtime is fine ,(and here's my question)I did not get from any examples to how should I bind the datasource to the labels and how to pass the parameter(UserId) from runtime and how to call the report from a webform. For example, I have a table called "User" with 3 fields: UserId, Username and Password. In the report designer I place 3 labels. Then I have a webform where the user is entering the userID and pulling some data and I have a print button on that webform when the user clicks the print button the data should be displayed on the report of UserId..

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• Printing an external file in its own printing routine

  - by Yawn.

  I basically have an application that generates reports in a .html file, I use a .html file for the ease of making tables and formatting text. Now I would like to introduce a way of printing the reports from my program. Because I use a .html file, the formatting would not the correct if I was to print it directly from my application (as far as I know). For this reason, I would like to print it just like my web browser would have in order to keep the tabular data intact and the text formatting. Does anyone know a way to do this? Thank you.

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• Asynchronous COMET query with Tornado and Prototype

  - by grundic

  Hello everyone. I'm trying to write simple web application using Tornado and JS Prototype library. So, the client can execute long running job on server. I wish, that this job runs Asynchronously - so that others clients could view page and do some stuff there. Here what i've got: #!/usr/bin/env/ pytthon import tornado.httpserver import tornado.ioloop import tornado.options import tornado.web from tornado.options import define, options import os import string from time import sleep from datetime import datetime define("port", default=8888, help="run on the given port", type=int) class MainHandler(tornado.web.RequestHandler): def get(self): self.render("templates/index.html", title="::Log watcher::", c_time=datetime.now()) class LongHandler(tornado.web.RequestHandler): @tornado.web.asynchronous def get(self): self.wait_for_smth(callback=self.async_callback(self.on_finish)) print("Exiting from async.") return def wait_for_smth(self, callback): t=0 while (t < 10): print "Sleeping 2 second, t={0}".format(t) sleep(2) t += 1 callback() def on_finish(self): print ("inside finish") self.write("Long running job complete") self.finish() def main(): tornado.options.parse_command_line() settings = { "static_path": os.path.join(os.path.dirname(__file__), "static"), } application = tornado.web.Application([ (r"/", MainHandler), (r"/longPolling", LongHandler) ], **settings ) http_server = tornado.httpserver.HTTPServer(application) http_server.listen(options.port) tornado.ioloop.IOLoop.instance().start() if __name__ == "__main__": main() This is server part. It has main view (shows little greeting, current server time and url for ajax query, that executes long running job. If you press a button, a long running job executes. And server hangs :( I can't view no pages, while this job is running. Here is template page: <html> <head> <title>{{ title }}</title> <script type="text/javascript" language="JavaScript" src="{{ static_url("js/prototype.js")}}"></script> <script type='text/javascript' language='JavaScript'> offset=0 last_read=0 function test(){ new Ajax.Request("http://172.22.22.22:8888/longPolling", { method:"get", asynchronous:true, onSuccess: function (transport){ alert(transport.responseText); } }) } </script> </head> <body> Current time is {{c_time}} <br> <input type="button" value="Test" onclick="test();"/> </body> </html> what am I doing wrong? How can implement long pooling, using Tornado and Prototype (or jQuery) PS: I have looked at Chat example, but it too complicated. Can't understand how it works :( PSS Download full example

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• Size Mismatch Between Swing Fonts and Printable Fonts in Java

  - by Caleb Rackliffe

  Hi All, I've got a panel displaying a JTextPane backed by a StyledDocument. When I print a string of text in, say Arial 16, the text it prints is of a different size than the Arial 16 Word prints. Is there some sort of flaw in the translation of Swing fonts to Windows system fonts or something of the sort that makes it difficult (or impossible) to print accurately? I can achieve an approximation by scaling down the size of my font before printing, but this never quite gets me the results I would like, as it's not possible in all cases to reproduce things like equivalent numbers of words on a line, etc. Has anybody run into this before?

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• I need to take an array of three lines in a text file and sort them base on the first line in Java.

  - by Cory

  I need to take an array of three lines in a text file and sort them base on the first line in Java. I also need to manipulate this as well and then print to screen. I have a test file that is formatted like this: 10 Michael Jackson 12 Richard Woolsey I need to input this from a text file and then rearrange it based on the number associated with the name. At that point, I need to use a random number generator and assign a variable based on the random number to each name. Then I need to print to screen the variable I added and the name in a different format. Here is an example of the output: 12: Woolsey, Richard Variable assigned 10: Jackson, Michael Other variable assigned I highly appreciate any help. I ask because I do not really know how to input the three lines as one variable and then manipulate later on in the program. Thanks, Cory

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• Simple python oo issue

  - by Alex K

  Hello, Have a look a this simple example. I don't quite understand why o1 prints "Hello Alex" twice. I would think that because of the default self.a is always reset to the empty list. Could someone explain to me what's the rationale here? Thank you so much. class A(object): def __init__(self, a=[]): self.a = a o = A() o.a.append('Hello') o.a.append('Alex') print ' '.join(o.a) # >> prints Hello Alex o1 = A() o1.a.append('Hello') o1.a.append('Alex') print ' '.join(o1.a) # >> prints Hello Alex Hello Alex

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• 'NoneType' object has no attribute 'get' error using SQLAlchemy

  - by Az

  I've been trying to map an object to a database using SQLAlchemy but have run into a snag. Version info if handy: [OS: Mac OSX 10.5.8 | Python: 2.6.4 | SQLAlchemy: 0.5.8] The class I'm going to map: class Student(object): def __init__(self, name, id): self.id = id self.name = name self.preferences = collections.defaultdict(set) self.allocated_project = None self.allocated_rank = 0 def __repr__(self): return str(self) def __str__(self): return "%s %s" %(self.id, self.name) Background: Now, I've got a function that reads in the necessary information from a text database into these objects. The function more or less works and I can easily access the information from the objects. Before the SQLAlchemy code runs, the function will read in the necessary info and store it into the Class. There is a dictionary called students which stores this as such: students = {} students[id] = Student(<all the info from the various "reader" functions>) Afterwards, there is an "allocation" algorithm that will allocate projects to student. It does that well enough. The allocated_project remains as None if a student is unsuccessful in getting a project. SQLAlchemy bit: So after all this happens, I'd like to map my object to a database table. Using the documentation, I've used the following code to only map certain bits. I also begin to create a Session. from sqlalchemy import * from sqlalchemy.orm import * engine = create_engine('sqlite:///:memory:', echo=False) metadata = MetaData() students_table = Table('studs', metadata, Column('id', Integer, primary_key=True), Column('name', String) ) metadata.create_all(engine) mapper(Student, students_table) Session = sessionmaker(bind=engine) sesh = Session() Now after that, I was curious to see if I could print out all the students from my students dictionary. for student in students.itervalues(): print student What do I get but an error: Traceback (most recent call last): File "~/FYP_Tests/FYP_Tests.py", line 140, in <module> print student File "/~FYP_Tests/Parties.py", line 30, in __str__ return "%s %s" %(self.id, self.name) File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/SQLAlchemy-0.5.8-py2.6.egg/sqlalchemy/orm/attributes.py", line 158, in __get__ return self.impl.get(instance_state(instance), instance_dict(instance)) AttributeError: 'NoneType' object has no attribute 'get' I'm at a loss as to how to resolve this issue, if it is an issue. If more information is required, please ask and I will provide it.

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• Printing PDFs Server-side using Acrobat Reader from ASP.NET

  - by Chris Roberts

  Hi, I have been presented with a problem which requires me to print PDF files from a server as part of an ASP.NET web service. The problem is further complicated by the fact that the PDF files I have to print can ONLY be printed using Adobe Reader (they were created using Adobe LiveCycle and have some strange protection in them). This piece of code seems to do the trick in the Visual Studio development web server, but doesn't do anything when the site's running in IIS. I'm assuming this is probably some sort of permissions issue!? I know this is a FAR from ideal thing to be trying to do, but I haven't really got much choice! Any ideas would be greatly appreciated! Dim starter As ProcessStartInfo Dim Prc As Process ' Pass File Path And Arguments starter = New ProcessStartInfo("c:\program files\...\AcroRd32.exe", "/t ""test.pdf"" ""Printer""") starter.CreateNoWindow = True starter.RedirectStandardOutput = True starter.UseShellExecute = False ' Start Adobe Process Prc = New Process() Prc.StartInfo = starter Prc.Start()

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• Python 2.7 - Help using an API (HL7)

  - by atomicluis

  I am new to programming and Python. I have a very basic python script that connects to server and send a text message: #!/usr/bin/python import socket s = socket.socket() host = '127.0.0.1' port = 4106 s.connect((host, port)) message = 'test1' s.send(message) print s.recv(1024) s.close Everything is fine, except that this message is an HL7 message and needs to wrapped in MLLP I found this API that I think can do this for me (http://python-hl7.readthedocs.org/en/latest/api.html#mllp-network-client) So I modified my program to the following, but I keep getting the error message: NameError: name 'MLLPClient' is not defined #!/usr/bin/python import socket import hl7 host = '127.0.0.1' port = 4106 with MLLPClient(host, port) as client: client.send_message('test1') print s.recv(1024) s.close Thanks in advanced for all the help

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• PrintPreview Window in C#

  - by M.Thillai

  Hello Techies, In my windows application in .net, i need to have Print Preview option for an excel file. The followings are my codings. //Excel.Application excelApp = new Excel.Application(); Excel.Workbook wb = excelApp.Workbooks.Open(@"C:\\Documents and Settings \\Admin \\Desktop \\DoCoMo\\ news5.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1]; ws.PrintPreview(Type.Missing); The compilation is successful. but i didn't get the print preview window. Is there any requirement of additional parameters or any other. I don't know how to achieve it . Please Guide me.I will be so great full to Our "Techies" for this Timely help. From, M.Thillai

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• Reuse another ASP.NET session (set Session ID)

  - by queen3

  My problem is that when I open web application from Outlook in a separate IE window, the ASP.NET session is lost. This is (as described in several places) because in-memory cookie is lost. So it goes like this: User works with ASP.NET web application in Outlook, and this stores some info in ASP.NET session User clicks Print to open new IE window with print-ready data The new window has different ASP.NET session ID and can't access old data. I think, maybe, if I pass ASP.NET session ID to new IE window, I can somehow "attach" to that session? Tell ASP.NET that this is the one that I need to be current?

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• Python3 error: "Import error: No module name urllib"

  - by Sergio Tapia

  Here's my code: from urllib.request import urlopen response = urllib.urlopen("http://www.google.com") html = response.read() print(html) Any help?

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• do-while loop in Python?

  - by Eye of Hell

  I need to emulate a do-while loop in a python. But, unfortunately, following straightforward code does not work: l = [ 1, 2, 3 ] i = l.__iter__() s = None while True : if s : print s try : s = i.next() except StopIteration : break print "done" Instead of "1,2,3,done" I have the following output: [stdout:]1 [stdout:]2 [stdout:]3 None['Traceback (most recent call last): ', ' File "test_python.py", line 8, in <module> s = i.next() ', 'StopIteration '] What can I do in order to catch 'stop iteration' excepton and break a while loop properly? Example why such thing may be needed. State machine: s = "" while True : if state is STATE_CODE : if "//" in s : tokens.add( TOKEN_COMMENT, s.split( "//" )[1] ) state = STATE_COMMENT else : tokens.add( TOKEN_CODE, s ) if state is STATE_COMMENT : if "//" in s : tokens.append( TOKEN_COMMENT, s.split( "//" )[1] ) else state = STATE_CODE # re-evaluate same line continue try : s = i.next() except StopIteration : break

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• Perl, LibXML and Schemas

  - by Xetius

  I have an example Perl script which I am trying to load and validate a file against a schema, them interrogate various nodes. #!/usr/bin/env perl use strict; use warnings; use XML::LibXML; my $filename = 'source.xml'; my $xml_schema = XML::LibXML::Schema->new(location=>'library.xsd'); my $parser = XML::LibXML->new (); my $doc = $parser->parse_file ($filename); eval { $xml_schema->validate ($doc); }; if ($@) { print "File failed validation: $@" if $@; } eval { print "Here\n"; foreach my $book ($doc->findnodes('/library/book')) { my $title = $book->findnodes('./title'); print $title->to_literal(), "\n"; } }; if ($@) { print "Problem parsing data : $@\n"; } Unfortunately, although it is validating the XML file fine, it is not finding any $book items and therefore not printing out anything. If I remove the schema from the XML file and the validation from the PL file then it works fine. I am using the default namespace. If I change it to not use the default namespace (xmlns:lib="http://libs.domain.com" and prefix all items in the XML file with lib and change the XPath expressions to include the namespace prefix (/lib:library/lib:book) then it again works file. Why? and what am I missing? XML: <?xml version="1.0" encoding="utf-8"?> <library xmlns="http://lib.domain.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://lib.domain.com .\library.xsd"> <book> <title>Perl Best Practices</title> <author>Damian Conway</author> <isbn>0596001738</isbn> <pages>542</pages> <image src="http://www.oreilly.com/catalog/covers/perlbp.s.gif" width="145" height="190"/> </book> <book> <title>Perl Cookbook, Second Edition</title> <author>Tom Christiansen</author> <author>Nathan Torkington</author> <isbn>0596003137</isbn> <pages>964</pages> <image src="http://www.oreilly.com/catalog/covers/perlckbk2.s.gif" width="145" height="190"/> </book> <book> <title>Guitar for Dummies</title> <author>Mark Phillips</author> <author>John Chappell</author> <isbn>076455106X</isbn> <pages>392</pages> <image src="http://media.wiley.com/product_data/coverImage/6X/07645510/076455106X.jpg" width="100" height="125"/> </book> </library> XSD: <?xml version="1.0" encoding="utf-8"?> <xs:schema xmlns="http://lib.domain.com" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://lib.domain.com"> <xs:attributeGroup name="imagegroup"> <xs:attribute name="src" type="xs:string"/> <xs:attribute name="width" type="xs:integer"/> <xs:attribute name="height" type="xs:integer"/> </xs:attributeGroup> <xs:element name="library"> <xs:complexType> <xs:sequence> <xs:element maxOccurs="unbounded" name="book"> <xs:complexType> <xs:sequence> <xs:element name="title" type="xs:string"/> <xs:element maxOccurs="unbounded" name="author" type="xs:string"/> <xs:element name="isbn" type="xs:string"/> <xs:element name="pages" type="xs:integer"/> <xs:element name="image"> <xs:complexType> <xs:attributeGroup ref="imagegroup"/> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>

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• Why doesn't Apache2::SubProcess spawn my subprocess?

  - by codeholic

  The following script works without errors, but /tmp/test.touch is not being created (even being checked later in the command line). It seems to me as if $r->spawn_proc_prog doesn't spawn a process. What may cause the problem? #!/usr/bin/perl use strict; use warnings; use Apache2::RequestUtil; use Apache2::SubProcess (); my $r = Apache2::RequestUtil->request; print "Content-Type: text/plain\n\n"; print eval { $r->spawn_proc_prog('/usr/bin/touch', ['/tmp/test.touch']) } ? `ls -l /tmp/test.touch` : $@;

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• Python MQTT: TypeError: coercing to Unicode: need string or buffer, bool found

  - by user2923860

  When my python code tries to connect to the MQTT broker it gives me this Type Error: Update- I added the Complete Error Traceback (most recent call last): File "test.py", line 20, in <module> mqttc.connect(broker, 1883, 60, True) File "/usr/local/lib/python2.7/dist-packages/mosquitto.py", line 563, in connect return self.reconnect() File "/usr/local/lib/python2.7/dist-packages/mosquitto.py", line 632, in reconnect self._sock = socket.create_connection((self._host, self._port), source_address=(self._bind_address, 0)) File "/usr/lib/python2.7/socket.py", line 561, in create_connection sock.bind(source_address) File "/usr/lib/python2.7/socket.py", line 224, in meth return getattr(self._sock,name)(*args) TypeError: coercing to Unicode: need string or buffer, bool found The code of the python file is: #! /usr/bin/python import mosquitto broker = "localhost" #define what happens after connection def on_connect(rc): print "Connected" #On recipt of a message do action def on_message(msg): n = msg.payload t = msg.topic if t == "/test/topic": if n == "test": print "test message received" # create broker mqttc = mosquitto.Mosquitto("python_sub") #define callbacks mqttc.on_message = on_message mqttc.on_connect = on_connect #connect mqttc.connect(broker, 1883, 60, True) #Subscribe to topic mqttc.subscribe("/test/topic", 2) #keep connected while mqttc.loop() == 0: pass I have no idea why its giving me this it work 2 days ago.

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• How to set target hosts in Fabric file

  - by ssc

  I want to use Fabric to deploy my web app code to development, staging and production servers. My fabfile: def deploy_2_dev(): deploy('dev') def deploy_2_staging(): deploy('staging') def deploy_2_prod(): deploy('prod') def deploy(server): print 'env.hosts:', env.hosts env.hosts = [server] print 'env.hosts:', env.hosts Sample output: host:folder user$ fab deploy_2_dev env.hosts: [] env.hosts: ['dev'] No hosts found. Please specify (single) host string for connection: When I create a set_hosts() task as shown in the Fabric docs, env.hosts is set properly. However, this is not a viable option, neither is a decorator. Passing hosts on the command line would ultimately result in some kind of shell script that calls the fabfile, I would prefer having one single tool do the job properly. It says in the Fabric docs that 'env.hosts is simply a Python list object'. From my observations, this is simply not true. Can anyone explain what is going on here ? How can I set the host to deploy to ?

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• django deleting models and overriding delete method

  - by Mike

  I have 2 models class Vhost(models.Model): dns = models.ForeignKey(DNS) user = models.ForeignKey(User) extra = models.TextField() class ApplicationInstalled(models.Model): user = models.ForeignKey(User) added = models.DateTimeField(auto_now_add=True) app = models.ForeignKey(Application) ver = models.ForeignKey(ApplicationVersion) vhost = models.ForeignKey(Vhost) path = models.CharField(max_length=100, default="/") def delete(self): # # remove the files # print "need to remove some files" super(ApplicationInstalled, self).delete() If I do the following >>> vhost = Vhost.objects.get(id=10) >>> vhost.id 10L >>> ApplicationInstalled.objects.filter(vhost=vhost) [<ApplicationInstalled: http://wiki.jy.com/>] >>> vhost.delete() >>> ApplicationInstalled.objects.filter(vhost=vhost) [] As you can see there is an applicationinstalled object linked to vhost but when I delete the vhost, the applicationinstalled object is gone but the print never gets called. Any easy way to do this without iterating through the objects in the vhost delete?

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• How can I flush the output of disp in Octave?

  - by Nathan Fellman

  I have a program in Octave that has a loop - running a function with various parameters, not something that I can turn into matrices. At the beginning of each iteration I print the current parameters using disp. The first times I ran it I had a brazillion warnings, and then I also got these prints. Now that I cleaned them up, I no longer see them. My guess is that they're stuck in a buffer, and I'll see them when the program ends or the buffer fills. Is there any way to force a flush of the print buffer so that I can see my prints?

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• Can you access registers from python functions in vim

  - by Michael Anderson

  It seems vims python sripting is designed to edit buffer and files rather than work nicely with vims registers. You can use some of the vim packages commands to get access to the registers but its not pretty. My solution for creating a vim function using python that uses a register is something like this. function printUnnamedRegister() python >> EOF print vim.eval('@@') EOF Setting registers may also be possible using something like function setUnnamedRegsiter() python >> EOF s = "Some \"crazy\" string\nwith interesting characters" vim.command('let @@="%s"' % myescapefn(s) ) EOF However this feels a bit cumbersome and I'm not sure exactly what myescapefn should be. So I've never been able to get the setting version to work properly. So if there's a way to do something more like function printUnnamedRegister() python >> EOF print vim.getRegister('@') EOF function setUnnamedRegsiter() python >> EOF s = "Some \"crazy\" string\nwith interesting characters" vim.setRegister('@',s) EOF Or even a nice version of myescapefn I could use then that would be very handy.

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• How to find the filename of a script being run when it is executed from a symlink on linux

  - by Phil Boltt

  Hi, If I have a python script that is executed via a symlink, is there a way that I can find the path to the script rather than the symlink? I've tried using the methods suggested in this question, but they always return the path to the symlink, not the script. For example, when this is saved as my "/usr/home/philboltt/scripts/test.py" : #!/usr/bin/python import sys print sys.argv[0] print __file__ and I then create this symlink ln -s /usr/home/philboltt/scripts/test.py /usr/home/philboltt/test and execute the script using /usr/home/philboltt/test I get the following output: /usr/home/philboltt/test /usr/home/philboltt/test Thanks! Phil

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• Objective-c Novice - Needs help with string with variable

  - by user544006

  Im trying to get my label to print out "your score is ." All i can find online is how to print using printf: int score=2; printf("You scored %i", score); But this does not work when using the setText method. I have also tried labelAnswer.setText:("You scored %i", score); [labelAnswer setText:("You scored %i", score)]; But these do not work. I get an error: "request for member in something not a structure or union" Can anyone help?

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