Search Results

Search found 13692 results on 548 pages for 'bad practices'.

Page 285/548 | < Previous Page | 281 282 283 284 285 286 287 288 289 290 291 292  | Next Page >

  • Python: Script works, but seems to deadlock after some time

    - by sberry2A
    I have the following script, which is working for the most part Link to PasteBin The script's job is to start a number of threads which in turn each start a subprocess with Popen. The output from each subprocess is as follows: 1 2 3 . . . n Done Bascially the subprocess is transferring 10M records from tables in one database to different tables in another db with a lot of data massaging/manipulation in between because of the different schemas. If the subprocess fails at any time in it's execution (bad records, duplicate primary keys, etc), or it completes successfully, it will output "Done\n". If there are no more records to select against for transfer then it will output "NO DATA\n" My intent was to create my script "tableTransfer.py" which would spawn a number of these processes, read their output, and in turn output information such as number of updates completed, time remaining, time elapsed, and number of transfers per second. I started running the process last night and checked in this morning to see it had deadlocked. There were not subprocceses running, there are still records to be updated, and the script had not exited. It was simply sitting there, no longer outputting the current information because no subprocces were running to update the total number complete which is what controls updates to the output. This is running on OS X. I am looking for three things: I would like to get rid of the possibility of this deadlock occurring so I don't need to check in on it as frequently. Is there some issue with locking? Am I doing this in a bad way (gThreading variable to control looping of spawning additional thread... etc.) I would appreciate some suggestions for improving my overall methodology. How should I handle ctrl-c exit? Right now I need to kill the process, but assume I should be able to use the signal module or other to catch the signal and kill the threads, is that right? I am not sure whether I should be pasting my entire script here, since I usually just paste snippets. Let me know if I should paste it here as well.

    Read the article

  • Python large variable RAM useage

    - by PPTim
    Hi, Say there is a dict variable that grows very large during runtime- up into millions of key:value pairs. Does this variable get stored in RAM,effectively using up all the available memory and slowing down the rest of the system? Asking the interpreter to display the entire dict is a bad idea, but would it be okay as long as one key is accessed at a time? Tim

    Read the article

  • How can I make clean search urls?

    - by newbie
    If I have search that has a lot of different options, then url becomes very long and looks very bad. Is there anyway to make urls look better? Using POST to make search would keep urls clean, but people couldn't share search urls.

    Read the article

  • Eclipse CDT debugger does not show console

    - by KáGé
    Hi, I'm trying to debug a C program using Eclipse CDT-s debugger and gdb on a Windows7 system, and everything seems fine, except for the console not showing up, which is bad, because my program needs input at some points from the keyboard. So how should I make Eclipse's debugger work properly? Thank you.

    Read the article

  • Javascript obfuscation and extreme situation in production solving

    - by faya
    Hello, I have a few questions regarding JavaScript obfuscation on client side. First question: What is the best tool or best three tools which ones you could suggest for this operation? Second question: How developers should debug such code (in example with firebug) when extreme situation appears in the production if the code is obfuscated? P.S. - I know that it's bad practice to debug in production, but we had some emergencies and experienced sometimes such situations. Thanks for any help!

    Read the article

  • HTML parser for GAE

    - by Richard
    Generally I use lxml for my HTML parsing needs, but that isn't available on Google App Engine. The obvious alternative is BeautifulSoup, but I find it chokes too easily on malformed HTML. Currently I am testing libxml2dom and have been getting better results. Which pure Python HTML parser have you found performs best? My priority is the ability to handle bad HTML over speed.

    Read the article

  • installing snippets

    - by Sevenearths
    How do I install snippets in django? (specifically this) I have the file /{project}/snippets/EnforceLoginMiddleware.py and I have tried any number of permutations inside MIDDLEWARE_CLASSES to load it as well as googling django snippets install to no avail :( Any help would be grateful :) PS(Why can't I find any documentation or examples on the installation of snippets. Maybe I'm just a bad googler)

    Read the article

  • Steps to make sure network is not blacklisted...Again

    - by msindle
    I have an interesting issue. I have a client that just got blacklisted due to spam being sent out over the last 2 days. I have my firewall configured to only allow mail to go outbound on port 25 from our mail server (Exchange 2010) exclusively and I have verified that there are no open relay's on our transport rules. We are running Vipre Business and after running deep scans with updated definitions all computers come back clean. I ran a message tracking report on our Exchange server that shows all mail sent via the mail server over the last couple of weeks and didn't see anything malicious or out of the ordinary. I have also verified that there are no home devices or rouge computers on the network. For all practical purposes it appears that the network is clean, but we still wound up on 5 or 6 blacklists...Where should I start looking next? Is there a "best practices" guide that can help eradicate this issue? Thanks in advance! msindle

    Read the article

  • Which audio playback technology do I need for this?

    - by mystify
    I have trouble choosing the right audio playback technology. There's a ton of technologies to use on the iPhone, it's so confusing. What I need to do is this: start playing short sounds ranging between 0.1 and 2 seconds high quality playback, no crackle (I heard some of the iPhone audio playback technologies do a crackle sound on start or end, which is bad!) ability to start playback of a sound, while there's already another one playing right now (two, three or more sounds at the same time) What would you suggest here, and why? Thanks :-)

    Read the article

  • Strange error from mysql storage engine

    - by zerkms
    General error: 1030 Got error -1 from storage engine the used storage engine is innodb the query was runned when i got it today morning was: SELECT feeds.* FROM feeds ORDER BY RAND() LIMIT 1 i know rand() is bad but it's very small table (<500 records) and not loaded project this error i receive approximately once a day. cannot google anything relevant :-(

    Read the article

  • Setting up a lab with Windows 2003 server and windows 7 clients

    - by Tathagata
    We are overhauling a lab with new machines with Windows 7 (as clients - around 150 of them). In the current infrastructure we have students logging in using a generic student id (as having individual student accounts doesn't really serve any additional purpose). This account, as you would imagine is a locked down one that can run a few (age old) softwares required by students in the class. Currently, the individual machines have XP images created by BartPE. What should be an ideal infrastructure design to cater to such a need with Windows Server 2003 and Windows 7 clients? It would be great if you can give me pointers to what concepts and background I need to have (like GPO), any design guidelines, best practices?

    Read the article

  • How can I get a file's size in C?

    - by Nino
    How can I find out the size of a file? I opened with an application written in C. I would like to know the size, because I want to put the content of the loaded file into a string, which I alloc using malloc(). Just writing malloc(10000*sizeof(char)); is IMHO a bad idea.

    Read the article

  • DotNetNuke will not save from editor

    - by Staffan
    A DNN site version 05.02.00(275) When editing a HTML module the following happens: If I make the changes and save before the cookie "portalaliasid" expires (within 1 minute) all is well. BUT if I stay in the editor for a longer time, say 2 minutes, and posting I end up at the editor again with the old content. All my previous work is lost. Now I'm lost - is this a bug, a bad setting or what? /Staffan

    Read the article

  • unit test for proxy checking

    - by zubin71
    Proxy configuration of a machine can be easily fetched using def check_proxy(): import urllib2 http_proxy = urllib2.getproxies().get('http') I need to write a test for the above written function. In order to do that I need to:- Set the system-wide proxy to an invalid URL during the test(sounds like a bad idea). Supply an invalid URL to http_proxy. How can I achieve either of the above?

    Read the article

  • Page File - Why set one for each drive?

    - by Magic
    Hello, I have Windows Vista Business Edition running on my laptop (brand is HCL). I have 4 HDD which are as follows - C - 29.2 GB (of which only 3.68 GB is free) D - 39 GB (of which 37.8 GB is free) E - 39 GB (of which 37.3 GB is free) F - 41.6 (of which 41.4 GB is free) However, my page file settings are as below. Automatically manage paging file for all drives. Question - Why should I set one for each drive? Should I set my page file on the OS Root Drive. I happen to talk to a System Administrator in an IT company and he advised that we should never set the page file on the OS drive but on an alternate drive wherever possible. It would be really helpful, if you can guide me here or at least point me to the right resources so that I can read about paging and best practices of paging. Cheers,

    Read the article

  • Compatibility between Qt and Boost sockets libraries

    - by cake
    Hello In my work, I'm developing a Viewer client for a Offshore simulation server, using sockets to send the simulation data from the Simulator to de Viewer. But, the server uses Boost.asio as it's sockets library. As the client uses Qt for it's GUI, I was wondering if there is any problem in using de Qt Networking library for handling the sockets. Is there any compatibility issues? Thanks in advance, and sorry for my bad english.

    Read the article

  • java api design - NULL or Exception

    - by srini.venigalla
    Is it better to return a null value or throw an exception from an API method? Returning a null requires ugly null checks all over, and cause a major quality problem if the return is not checked. Throwing an exception forces the user to code for the faulty condition, but since Java exceptions bubble up and force the caller code to handle them, in general, using custom exceptions may be a bad idea (specifically in java). Any sound and practical advice?

    Read the article

  • How to crop scanned image using C#?

    - by ieaglle
    I have a scanned image of a book page and i need to crop this scan for leaving only page area. I tried to use AForge to detect page borders, but it doesn't work because the space which i need to crop may consist of little "light" areas (due to scanner quality) and edge detector detects borders there. That's why this is bad idea as for me. Could you recommend something? P.S. Please don't tell me to use non-free libraries.

    Read the article

  • C++ Virtual Constructor, without clone()

    - by Julien L.
    I want to perform "deep copies" of an STL container of pointers to polymorphic classes. I know about the Prototype design pattern, implemented by means of the Virtual Ctor Idiom, as explained in the C++ FAQ Lite, Item 20.8. It is simple and straightforward: struct ABC // Abstract Base Class { virtual ~ABC() {} virtual ABC * clone() = 0; }; struct D1 : public ABC { virtual D1 * clone() { return new D1( *this ); } // Covariant Return Type }; A deep copy is then: for( i = 0; i < oldVector.size(); ++i ) newVector.push_back( oldVector[i]->clone() ); Drawbacks As Andrei Alexandrescu states it: The clone() implementation must follow the same pattern in all derived classes; in spite of its repetitive structure, there is no reasonable way to automate defining the clone() member function (beyond macros, that is). Moreover, clients of ABC can possibly do something bad. (I mean, nothing prevents clients to do something bad, so, it will happen.) Better design? My question is: is there another way to make an abstract base class clonable without requiring derived classes to write clone-related code? (Helper class? Templates?) Following is my context. Hopefully, it will help understanding my question. I am designing a class hierarchy to perform operations on a class Image: struct ImgOp { virtual ~ImgOp() {} bool run( Image & ) = 0; }; Image operations are user-defined: clients of the class hierarchy will implement their own classes derived from ImgOp: struct CheckImageSize : public ImgOp { std::size_t w, h; bool run( Image &i ) { return w==i.width() && h==i.height(); } }; struct CheckImageResolution; struct RotateImage; ... Multiple operations can be performed sequentially on an image: bool do_operations( std::vector< ImgOp* > v, Image &i ) { std::for_each( v.begin(), v.end(), /* bind2nd(mem_fun(&ImgOp::run), i ...) don't remember syntax */ ); } int main( ... ) { std::vector< ImgOp* > v; v.push_back( new CheckImageSize ); v.push_back( new CheckImageResolution ); v.push_back( new RotateImage ); Image i; do_operations( v, i ); } If there are multiple images, the set can be split and shared over several threads. To ensure "thread-safety", each thread must have its own copy of all operation objects contained in v -- v becomes a prototype to be deep copied in each thread.

    Read the article

< Previous Page | 281 282 283 284 285 286 287 288 289 290 291 292  | Next Page >