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  • Making an asynchronous interface appear synchronous to mod_python users

    - by Trey
    I have a Python-driven web interface powered by Apache 2.2 with mod_python and Python 2.4. I need to make an asynchronous process appear synchronous to users of this web interface. When users access one module on this website: An external SOAP interface will be contacted with a unique identifier and will respond with a number N The external interface will respond asynchronously by contacting a SOAP server on my machine between 1 and 10 times (the number N tells us how many responses we will receive) I need to somehow aggregate these responses and pass them to the original module which will display the information back to the user. The goal is to make the process appear synchronous to the user. What is the best way to handle this synchronization issue? Is this something Twisted would be well-suited for? I am not restricting myself to Python for the solution, though it is preferred because everything else on the server is in Python. I prefer a solution that is both scalable and will take a minimal amount of programming time (though I understand that these attributes are somewhat at odds).

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  • Is there a way to convert code to a string and vice versa in Python?

    - by Dragos Toader
    The original question was: Is there a way to declare macros in Python as they are declared in C: #define OBJWITHSIZE(_x) (sizeof _x)/(sizeof _x[0]) Here's what I'm trying to find out: Is there a way to avoid code duplication in Python? In one part of a program I'm writing, I have a function: def replaceProgramFilesPath(filenameBr): def getProgramFilesPath(): import os return os.environ.get("PROGRAMFILES") + chr(92) return filenameBr.replace("<ProgramFilesPath>",getProgramFilesPath() ) In another part, I've got this code embedded in a string that will later be output to a python file that will itself be run: """ def replaceProgramFilesPath(filenameBr): def getProgramFilesPath(): import os return os.environ.get("PROGRAMFILES") + chr(92) return filenameBr.replace("<ProgramFilesPath>",getProgramFilesPath() ) """ How can I build a "macro" that will avoid this duplication?

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  • How to convert Beautiful Soup Unicode into a decimal value?

    - by MikeTheCoder
    I'm trying to Use python's Beautiful Soup Library to grab a bunch of divs from an html file, and from there get the string - which is a money value - that's inside the div. Then remove the dollar sign and convert it to a decimal so that I can use a greater than and less than conditional statement to compare values. I have googled the heck out of it and can't seem to come up with a way to convert this unicode string into a decimal value. I really could use some help here. How do I convert unicode into a decimal value? This was my last attempt: import unicodedata from bs4 import BeautifulSoup soup = BeautifulSoup(open("/Users/sm/Documents/python/htmldemo.html")) for tag in soup.findAll("div",attrs={"itemprop":"price"}) : val = tag.string new_val = val[8:] workable = int(new_val) if workable > 250: print(type(workable)) else: print(type(workable)) Edit: When I print the type of new_val I get : print(type(new_val))

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  • Trouble with arraylist and stack

    - by helloman
    I am having trouble starting out this program, I am suppose to write a program that will create an ArrayList, asking the user for 10 numbers. Then this will be put into the Array. Then after the list is made navigate it and if a number is even remove it from the ArrayList and copy it to a stack of integers. import java.io.* ; import java.util.*; public class Test { public static void main(String[] args){ Scanner input = new Scanner (System.in); ArrayList<Integer> integers = new ArrayList<Integer>(); System.out.print ("Enter Number: \n"); for (int i = 0; i < 10; i++){ integers.add(input.nextInt()); } for (int i = 0; i < 10 ; i++){ if (i %2==0) } } }

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  • Printing Two Dimensional Array in Special Format

    - by user554313
    Hello everybody, I am working in a small task that allow the user to enter the regions of any country and store them in one array. Also, each time he enters a region, the system will ask him to enter the neighbours of that entered region and store these neighbours. I did the whole task but I have a small problem: I could not be able to print each region and its neighbours like the following format: Region A: neighbour1 neighbour2 Region B: neighbour1 neighbour2 For example, let us take USA map. I want to print the result as following: Washington D.C: Texas, Florida, Oregon and so on. My code is: import java.io.*; import java.util.Arrays; import java.util.Scanner; public class Test7{public static void main(String[] args) { Scanner kb = new Scanner(System.in); System.out.print("Please enter the number of regions: "); int REGION_COUNT = kb.nextInt(); String[] regionNames = new String[REGION_COUNT]; String[][] regions = new String[REGION_COUNT][2]; for (int r = 0; r < regions.length; r++) { System.out.print("Please enter the name of region #" + (r + 1) + ": "); regionNames[r] = kb.next(); System.out .print("How many neighbors for region #" + (r + 1) + ": "); if (kb.hasNextInt()) { int size = kb.nextInt(); regions[r] = new String[size]; for (int n = 0; n < size; n++) { System.out.print("Please enter the neighbour #" + (n) + ": "); regions[r][n] = kb.next(); } } else System.exit(0); } for (int i = 0; i < REGION_COUNT; i++) { System.out.print(regionNames[i] +": "); for (int k = 0; k < 2; k++) { System.out.print(regions[i][k]+", "); } System.out.println(); } } }

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  • How to get the field name of a java (weak) reference pointing to an object in an other class?

    - by Tom
    Imagine I have the following situation: Test1.java import java.lang.ref.WeakReference; public class Test1 { public WeakReference fieldName; public init() { fieldName = new WeakReference(this); Test2.setWeakRef(fieldName); } } Test2.java import java.lang.ref.WeakReference; public class Test2 { public static setWeakRef(WeakReference weakRef) { //at this point I got weakRef in an other class.. now, how do I get the field name this reference was created with? So that it returns exactly "fieldName", because that's the name I gave it in Test1.java? } } At the location of the comment I received the weak reference created in an other class. How would I retreive the field name that this weak reference was created with, in this case "fieldName"? Thanks in advance.

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  • @property, ok in this situation?

    - by fuzzygoat
    I am still finding my feet with objective-c and was wondering if its acceptable to use @property on the two objects below. #import <UIKit/UIKit.h> #import <MapKit/MapKit.h> @interface MapViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate> { CLLocationManager *locationManager; IBOutlet MKMapView *googleMapView; } @property(nonatomic, retain) CLLocationManager *locationManager; @property(nonatomic, retain) MKMapView *googleMapView; @end One of my reasons for using them is so that I can use the setters in my viewDidUnload, I seem to be using @property a lot and was just wondering if the use in this situation is acceptable? -(void)viewDidUnload { [self setLocationManager:nil]; [self setGoogleMapView:nil]; [super viewDidUnload]; } much appreciated Gary

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  • Adding Apache common dependency to Play Framework 2.0

    - by Mooh
    i want to import org.apache.commons.io but i'm getting this error: [info] Compiling 1 Java source to /home/ghost/Bureau/app/play-2.0.1/waf/target/scala-2.9.1/classes... [error] /home/ghost/Bureau/app/play-2.0.1/waf/app/controllers/Application.java:9: error: package org.apache.commons.io does not exist [error] import org.apache.commons.io.*; [error] ^ [error] /home/ghost/Bureau/app/play-2.0.1/waf/app/controllers/Application.java:41: error: cannot find symbol [error] FileUtils.copyFile(file, destinationFile); [error] ^ [error] symbol: variable FileUtils [error] location: class Application [error] 2 errors [error] {file:/home/ghost/Bureau/app/play-2.0.1/waf/}waf/compile:compile: javac returned nonzero exit code [error] application - Play can't find package org.apache.commons.io . How i can i add it as a dependency ?

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  • Calculating the null space of a matrix

    - by Ainsworth
    I'm attempting to solve a set of equations of the form Ax = 0. A is known 6x6 matrix and I've written the below code using SVD to get the vector x which works to a certain extent. The answer is approximately correct but not good enough to be useful to me, how can I improve the precision of the calculation? Lowering eps below 1.e-4 causes the function to fail. from numpy.linalg import * from numpy import * A = matrix([[0.624010149127497 ,0.020915658603923 ,0.838082638087629 ,62.0778180312547 ,-0.336 ,0], [0.669649399820597 ,0.344105317421833 ,0.0543868015800246 ,49.0194290212841 ,-0.267 ,0], [0.473153758252885 ,0.366893577716959 ,0.924972565581684 ,186.071352614705 ,-1 ,0], [0.0759305208803158 ,0.356365401030535 ,0.126682113674883 ,175.292109352674 ,0 ,-5.201], [0.91160934274653 ,0.32447818779582 ,0.741382053883291 ,0.11536775372698 ,0 ,-0.034], [0.480860406786873 ,0.903499596111067 ,0.542581424762866 ,32.782593418975 ,0 ,-1]]) def null(A, eps=1e-3): u,s,vh = svd(A,full_matrices=1,compute_uv=1) null_space = compress(s <= eps, vh, axis=0) return null_space.T NS = null(A) print "Null space equals ",NS,"\n" print dot(A,NS)

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  • deploying a war to tomcat using python

    - by Decado
    Hi, I'm trying to deploy a war to a Apache Tomcat server (Build 6.0.24) using python (2.4.2) as part of a build process. I'm using the following code import urllib2 import base64 war_file_contents = open('war_file.war','rb').read() username='some_user' password='some_pwd' base64string = base64.encodestring('%s:%s' % (username, password))[:-1] authheader = "Basic %s" % base64string opener = urllib2.build_opener(urllib2.HTTPHandler) request = urllib2.Request('http://158.155.40.110:8080/manager/deploy?path=war_file', data=war_file_contents) request.add_header('Content-Type', 'application/octet-stream') request.add_header("Authorization", authheader) request.get_method = lambda: 'PUT' url = opener.open(request) the url.code is 200, and the url.msg is "OK". However the web archive doesn't appear on the manager list applications page. Thanks.

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  • Flex custom toggleswitch not working in actionscript

    - by Gavin Jones
    I have a custom Flex Toggleswitch component that changes the text values of the switch. package skins { import spark.skins.mobile.ToggleSwitchSkin; public class MyToggleSwitchSkin extends ToggleSwitchSkin { public function MyToggleSwitchSkin() { super(); selectedLabel="Serviceable"; unselectedLabel="Fault"; } } } If I add the control using the MXML tag, it works fine. However, when I add the component using action script, it does not. import skins.MyToggleSwitchSkin; public function addToggle():void { var myCustomToggle:MyToggleSwitchSkin = new MyToggleSwitchSkin(); hgroup.addElement(myCustomToggle); } The control dsiplays but will not activate. Any ideas what I have missed?

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  • Behavior of nested finally in Exceptions

    - by kuriouscoder
    Hello: Today at work, I had to review a code snippet that looks similar to this mock example. package test; import java.io.IOException; import org.apache.log4j.Logger; public class ExceptionTester { public static Logger logger = Logger.getLogger(ExceptionTester.class); public void test() throws IOException { new IOException(); } public static void main(String[] args) { ExceptionTester comparator = new ExceptionTester(); try { try { comparator.test(); } finally { System.out.println("Finally 1"); } } catch(IOException ex) { logger.error("Exception happened" ex); // also close opened resources } System.out.println("Exiting out of the program"); } } It's printing the following output.I expected an compile error since the inner try did not have a catch block. Finally 1 Exiting out of the program I do not understand why IOException is caught by the outer catch block. I would appreciate if anyone can explain this, especially by citing stack unwinding process

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  • Problem executing with Python+MySQL

    - by Satya
    Hi, I am not getting the reason why my python script is not working though I hv put all the things correctly as my knowledge.The below test I did and it worked fine.But when I import the MySQLdb in my script it gives error as no module name MySQLdb. **C:\Python26python Python 2.6.1 (r261:67517, Dec 4 2008, 16:51:00) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. import MySQLdb ** Kindly let me know the reason for this error. And all the development is going on in windows XP, python 2.6, mysql 4.0.3 Earlier 1 hour back I have posted the question but some mistake was there in the question itself..

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  • Iphone App deve- Very basic table view but getting errors , trying for 2 days!! just for info using

    - by user342451
    Hi guys, trying to write this code since 2 days now, but i keep getting error, it would be nice if anyone could sort this out, thanks. Basically its the same thing i doing from the tutorial on youtube. awaiting a reply // // BooksTableViewController.m // Mybooks // // import "BooksTableViewController.h" import "BooksDetailViewController.h" import "MYbooksAppDelegate.h" @implementation BooksTableViewController @synthesize BooksArray; @synthesize BooksDetailViewController; /* - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier { if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) { // Initialization code } return self; } */ (void)viewDidLoad { [super viewDidLoad]; self.title = NSLocalizedString(@"XYZ",@"GOD is GREAT"); NSMutableArray *array = [[NSArray alloc] initWithObjects:@"H1",@"2",@"3",nil]; self.booksArray = array; [array release]; } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview // Release anything that's not essential, such as cached data } pragma mark Table view methods (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } // Customize the number of rows in the table view. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [self.booksArray count]; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *identity = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identity]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:identity] autorelease]; } // Set up the cell... cell.textLabel.text = [booksArray objectAtIndex:indexPath.row]; return cell; } /* - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { booksDetailsViewControler *NC = [[booksDetailsViewControler alloc] initWithNibName:@"BooksDetailsView" bundle:nil]; [self.navigationController pushViewController:NC animated:YES]; //[booksDetailViewController changeProductText:[booksArray objectAtIndex:indexPath.row]]; } */ NSInteger row = [indexPath row]; if (self.booksDetailViewController == nil) { BooksiDetailViewController *aCellDetails = [[AartiDetailViewController alloc] initWithNibName:@" BooksDetailViewController" bundle:nil]; self.booksDetailViewController = aCellDetails; [aCellDetails release]; } booksDetailViewController.title = [NSString stringWithFormat:@"%@", [booksArray objectAtIndex:row]]; //DailyPoojaAppDelegate *delegate = [[UIApplication sharedApplication] delegate]; //[delegate.AartiNavController pushViewController:aartiDetailsViewControler animated:YES]; [self.navigationController pushViewController:aartiDetailViewController animated:YES]; } /* NSInteger row = [indexPath row]; if (self.booksDetailsViewControler == nil) { AartiDetailsViewControler *aBookDetail = [[BooksDetailsViewControler alloc] initWithNibName:@"booksDetaislView" bundle:nil]; self.booksDetailsViewControler = aBookDetail; [aBookDetail release]; } booksDetailsViewControler.title = [NSString stringWithFormat:@"%@", [booksArray objectAtIndex:row]]; [self.navigationController pushViewController:booksDetailsViewControler animated:YES]; */ (void)dealloc { [aartiDetailViewController release]; [super dealloc]; } @end

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  • Phonegap 2.1 for Android - Hello World App 3 errors at launch

    - by noway
    I developed something with Phonegap for iOS, but this is my first trial for Android. I created my hello world application with CLI sth like this mentioned here: $ /path/to/cordova-android/bin/create /path/to/my_new_cordova_project com.example.cordova_project_name CordovaProjectName Even though I created this app in Eclipse Workspace, I needed to import it to Eclipse. I created two AVDs. One for API level 8, one for API level 16. When I try to build, it gives me these three errors and a warning. What is wrong with my setup? Description Resource Path Location Type error: No resource identifier found for attribute 'hardwareAccelerated' in package 'android' AndroidManifest.xml /com.example.test.testprojectname line 20 Android AAPT Problem error: No resource identifier found for attribute 'xlargeScreens' in package 'android' AndroidManifest.xml /com.example.test.testprojectname line 22 Android AAPT Problem error: Error: String types not allowed (at 'configChanges' with value 'orientation|keyboardHidden|keyboard|screenSize|locale'). AndroidManifest.xml /com.example.test.testprojectname line 51 Android AAPT Problem The import android.app.Activity is never used testprojectname.java /com.example.test.testprojectname/src/com/example/test line 22 Java Problem

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  • python multiprocessing.Process.Manager not producing consistent results?

    - by COpython
    I've written the following code to illustrate the problem I'm seeing. I'm trying to use a Process.Manager.list() to keep track of a list and increment random indices of that list. Each time there are 100 processes spawned, and each process increments a random index of the list by 1. Therefore, one would expect the SUM of the resulting list to be the same each time, correct? I get something between 203 and 205. from multiprocessing import Process, Manager import random class MyProc(Process): def __init__(self, A): Process.__init__(self) self.A = A def run(self): i = random.randint(0, len(self.A)-1) self.A[i] = self.A[i] + 1 if __name__ == '__main__': procs = [] M = Manager() a = M.list(range(15)) print('A: {0}'.format(a)) print('sum(A) = {0}'.format(sum(a))) for i in range(100): procs.append(MyProc(a)) map(lambda x: x.start(), procs) map(lambda x: x.join(), procs) print('A: {0}'.format(a)) print('sum(A) = {0}'.format(sum(a)))

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  • How to refresh database data only in SQL Server

    - by MaxGeek
    So I want to copy just the data from a Prod database (SQL 2005) down to my local machine (SQL 2005 & SQL 2008 Management Studio installed). The problem is I'm running into foreign key constraints that are causing the task/scripts to fail. I can get by these errors if I import certain tables first, but is there an easier way to do this all at once? I'm not a DBA so I don't have access to the database back up. I've tried the SQL Import/Export data Wizard and Publishing Wizard, but it also gets the PK error.

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  • how to draw rectangle around mouse cursor in java?

    - by Nitz
    hey guys i had made one module in my project, on which user can draw any thing using pencil now i want to create eraser for that drawing module so i need that as soon as user click on that eraser button then, around my mouse cursor i want little rectangle shape around it. so user can use it to erase the some parts in drawing. may be smilier kind of things happen in mspaint but i am doing this in java - swing. how to do this, any suggestion? thanks in advance... nitz.

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  • Haskell: Problems with overloading: Interpreter can´t tell which + to use

    - by Ben
    Hi, I want to make functions Double - Double an instance of the Num typeclass. I want to define the sum of two functions as sum of their images. So I wrote instance Num Function where f + g = (\ x - (f x) + (g x)) Here the compiler complains he can´t tell whether I´m using Prelude.+ or Module.+ in the lambda expression. So I imported Prelude qualified as P and wrote instance Num Function where f + g = (\ x - (f x) P.+ (g x)) This compiles just fine, but when I try to add two functions in GHCi the interpreter complains again he can´t tell whether I´m using Prelude.+ or Module.+. Is there any way I can solve this problem?

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  • Python preprocessing imports

    - by FiloSottile
    I am managing a quite large python code base (2000 lines) that I want anyway to be available as a single runnable python script. So I am searching for a method or a tool to merge a development folder, made of different python files into a single running script. The thing/method I am searching for should take code split into different files, maybe with a starting __init___.py file that contains the imports and merge it into a single, big script. Much like a preprocessor. Best if a near-native way, better if I can anyway run from the dev folder. I have already checked out pypp and pypreprocessor but they don't seem to take the point. Something like a strange use of __import__() or maybe a bunch of from foo import * replaced by the preprocessor with the code? Obviously I only want to merge my directory and not common libraries.

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  • Best way to parse XMPP-like XML streams?

    - by codethief
    I am working on a server application which receives data over a TCP socket in an XMPP-like XML format, i.e. every child of the <root> element essentially represents one separate request (stanza). The connection is closed as soon as </root> is received. I do know that I must use a stream parser like SAX, somehow. Though, for convenience, I'd prefer to have a tree-like interface to access each stanza's child elements. (The data sent with every request is not large so I think it makes sense to read each stanza as a whole.) What's the best way to realize that in Python (preferably v3)? This is the code I'd like to build it in. Feel free to point me in a totally different direction to solve this issue. import socketserver import settings class MyServer(socketserver.ThreadingMixIn, socketserver.TCPServer): pass class MyRequestHandler(socketserver.StreamRequestHandler): def handle(self): pass if __name__ == '__main__': server = MyServer((settings.host, settings.port), MyRequestHandler) server.serve_forever()

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  • Difficulties with Django on Google App Engine

    - by Rosarch
    I have a Django project that works fine. I'm trying to import it to Google App Engine. I run it on the dev server, and I get an import error: ImportError at / No module named mysite.urls This is the folder structure of mysite/: app.yaml <DIR> myapp index.yaml main.py manage.py <DIR> media settings.py urls.py __init__.py app.yaml: application: mysite version: 1 runtime: python api_version: 1 handlers: - url: .* script: main.py from settings.py: ROOT_URLCONF = 'mysite.urls' What am I doing wrong?

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  • Objective C instance variables - Newbie

    - by Dwayne King
    OK - so I'm sure my confusion here is just a result of being stuck in a "Java mindset" and not understanding how Obj C differs in this case. In Java, I can declare a variable in a class, like this, and each instance of that class will have it's own: MyClass { String myVar; MyClass() { // constructor } } In Obj C I tried to do the same thing by declaring a variable only in the .m file like this: #import "MyClass.h" @implementation MyClass NSString *testVar; @end My expectation here was that this variable has a scope limited to this class. So I created a second class (identical): #import "MySecondClass.h" @implementation MySecondClass NSString *testVar; @end What I'm seeing (and has me baffled) is that changing the variable in one class, affects the value seen in the other class. In fact, if I set a breakpoint, and then "Jump to Definition" of the variable, it takes me to th I've created an extremely small XCode project that demonstrates the problem here Nothing more humbling than moving to a new language :) Thanks in advance.

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