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  • Searching for specific HTML string using Python

    - by Morpheous
    What modules would be the best to write a python program that searches through hundreds of html documents and deletes a certain string of html that is given. For instance, if I have an html doc that has <a href="test.html">Test</a> and I want to delete this out of every html page that has it. Any help is much appreciated, and I don't need someone to write the program for me, just a helpful point in the right direction.

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  • Detect marker with opencv and python

    - by Mitch
    Hi im trying to detect a marker in a webcam video feed and overlay it with a 3d object - pretty much exactly like this: http://www.morethantechnical.com/2009/06/28/augmented-reality-with-nyartoolkit-opencv-opengl/ i know artoolkit is the best module for this, but i was hoping to just use opencv in python since i dont know nearly enough c/c++ to be able to use artoolkit. im hoping someone will be able to get me on the right track towards detecting the marker and determining its location and orientation etc since i have no idea how best to go about this or what functions i should be using thanks mitch

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  • Populate a list from xml using python

    - by Sam
    I have an xml file in the following format: <food> <desert> cake <desert> </food> <history> currently in my belly </history> I want to create two list, food and text populated with cake and history in string format. Is there an easy way to do it in python?

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  • running a python script where dependencies are not avail: distributed computing

    - by sadhu_
    Hi, I have access to a grid (running condor) that would (potentially) allow to very substantially reduce how long by nltk based nlp tasks take. unfortunately, i dont have root access on the cluster so cannot install new packages, only run whatever is available on the linux boxes. python is of course available, but nltk isnt - i was wondering however, if there might be a way around this somehow ? is there a way i can somehow still distribute the task in a self-contained 'package' of some sort? Thanks for your hel

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  • A good file path builder library for C#?

    - by Igor Brejc
    System.IO.Path in .NET is notoriously clumsy to work with. In my various projects I keep encountering the same usage scenarios which require repetitive, verbose and thus error-prone code snippets that use Path.Combine, Path.GetFileName, Path.GetDirectoryName, String.Format, etc. Scenarios like: changing the extension for a given file name changing the directory path for a given file name building a file path using string formatting (like "Package{0}.zip") building a path without resorting to using hard-coded directory delimiters like \ (since they don't work on Linux on Mono) etc etc Before starting to write my own PathBuilder class or something similar: is there a good (and proven) open-source implementation of such a thing in C#?

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  • Should I worry about circular references in Python?

    - by bodacydo
    Suppose I have code that maintains parent/children structure. In such a structure I get circular references, where child points to parent and parent points to child. Should I worry about them? I'm using Python 2.5. I am concerned that they will not be garbage collected and the application will eventually consume all memory. Thanks, Boda Cydo.

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  • Dynamic DateTimeRangeValidator using Enterprise Library 4.1?

    - by Toran Billups
    I'm trying to add a range of - 365 days and + 365 days but it appears that using this attribute in EL 4.1 only accepts a special ISO formatted string ... thus I can't simply add a normal string to this validation routine. <DateTimeRangeValidator(DateTime.Now.AddDays(2), DateTime.Now.AddDays(4))> _ I wanted to do something similar to the above - fyi Does anyone know how you can force this attribute to accept this ISO formatted string w/out hand coding this value?

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  • Can't import obj in Python on OS X 10.6.3 Snow Leopard - libiconv.2.dylib?

    - by James
    on OS X 10.6.3 Snow Leopard % python Python 2.6.1 (r261:67515, Feb 11 2010, 00:51:29) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. import objc Traceback (most recent call last): File "", line 1, in File "/Library/Python/2.6/site-packages/pyobjc_core-2.2-py2.6-macosx-10.6-universal.egg/objc/__init__.py", line 22, in _update() File "/Library/Python/2.6/site-packages/pyobjc_core-2.2-py2.6-macosx-10.6-universal.egg/objc/__init__.py", line 19, in _update import _objc ImportError: dlopen(/Library/Python/2.6/site-packages/pyobjc_core-2.2-py2.6-macosx-10.6-universal.egg/objc/_objc.so, 2): Library not loaded: /opt/local/lib/libiconv.2.dylib Referenced from: /Library/Python/2.6/site-packages/pyobjc_core-2.2-py2.6-macosx-10.6-universal.egg/objc/_objc.so Reason: Incompatible library version: _objc.so requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 -- what do I need to do?

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  • Easiest ways to generate graphs from Python?

    - by Noah Weiss
    I'm using Python to process CSV files filled with data that I want to run calculations on, and then graph. I'm looking for a library to use that I can send processed CSV information to, or a dict of some sort, and then choose different graphing styles with. Does anyone have any recommendations?

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  • Get Element value with minidom, Python

    - by Eef
    Hi Guys, I am creating a GUI frontend for the Eve Online API in Python. I have successfully pulled the XML data from their server. I am trying to grab the value from a node called "name" from xml.dom.minidom import parse dom = parse("C:\\eve.xml") name = dom.getElementsByTagName('name') print name This seems to find the node ok but the output is below: [<DOM Element: name at 0x11e6d28>] How could I get it to print the value of the node? Cheers

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  • Python - doctest vs. unittest

    - by Sean
    I'm trying to get started with unit testing in Python and I was wondering if someone could inform me of the advantages and disadvantages of doctest and unittest. What conditions would you use each for?

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  • Attribute References in Python

    - by Jeune
    I do Java programming and recently started learning Python via the official documentation. I see that we can dynamically add data attributes to an instance object unlike in Java: class House: pass my_house = House() my_house.number = 40 my_house.rooms = 8 my_house.garden = 1 My question is, in what situations is this feature used? What are the advantages and disadvantages compared to the way it is done in Java?

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  • Parsing a file with hierarchical structure in Python

    - by Kevin Stargel
    I'm trying to parse the output from a tool into a data structure but I'm having some difficulty getting things right. The file looks like this: Fruits Apple Auxiliary Core Extras Banana Something Coconut Vegetables Eggplant Rutabaga You can see that top-level items are indented by one space, and items beneath that are indented by two spaces for each level. The items are also in alphabetical order. How do I turn the file into a Python list that's something like ["Fruits", "Fruits/Apple", "Fruits/Banana", ..., "Vegetables", "Vegetables/Eggplant", "Vegetables/Rutabaga"]?

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  • convert RGB values to equivalent HSV values using python

    - by sree01
    Hi, I want to convert RGB values to HSV using python. I got some code samples, which gave the result with the S and V values greater than 100. (example : http://code.activestate.com/recipes/576554-covert-color-space-from-hsv-to-rgb-and-rgb-to-hsv/ ) . anybody got a better code which convert RGB to HSV and vice versa thanks

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  • appscript on OSX 10.6.3 / Python 2.6.1

    - by jldupont
    I am having some trouble getting appscript installed on OS/X 10.6.3 / Python 2.6.1. When I issue sudo easy_install appscript I get "unable to execute gcc-4.2: No such file or directory". Even when I do export CC=/Developer/usr/bin/gcc-4.2 (a valid gcc-4.2 executable), easy_install barks. What could be the issue? Disclaimer: OS/X newbie at the helm...

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  • 640 enterprise library caching threads - how?

    - by JohnW
    We have an application that is undergoing performance testing. Today, I decided to take a dump of w3wp & load it in windbg to see what is going on underneath the covers. Imagine my surprise when I ran !threads and saw that there are 640 background threads, almost all of which seem to say the following: OS Thread Id: 0x1c38 (651) Child-SP RetAddr Call Site 0000000023a9d290 000007ff002320e2 Microsoft.Practices.EnterpriseLibrary.Caching.ProducerConsumerQueue.WaitUntilInterrupted() 0000000023a9d2d0 000007ff00231f7e Microsoft.Practices.EnterpriseLibrary.Caching.ProducerConsumerQueue.Dequeue() 0000000023a9d330 000007fef727c978 Microsoft.Practices.EnterpriseLibrary.Caching.BackgroundScheduler.QueueReader() 0000000023a9d380 000007fef9001552 System.Threading.ExecutionContext.runTryCode(System.Object) 0000000023a9dc30 000007fef72f95fd System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) 0000000023a9dc80 000007fef9001552 System.Threading.ThreadHelper.ThreadStart() If i had to give a guess, I'm thinkign that one of these threads are getting spawned for each run of our app - we have 2 app servers, 20 concurrent users, and ran the test approximately 30 times...it's in the neighborhood. Is this 'expected behavior', or perhaps have we implemented something improperly? The test ran hours ago, so i would have expected any timeouts to have occurred already.

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  • Cost of exception handlers in Python

    - by Thilo
    In another question, the accepted answer suggested replacing a (very cheap) if statement in Python code with a try/except block to improve performance. Coding style issues aside, and assuming that the exception is never triggered, how much difference does it make (performance-wise) to have an exception handler, versus not having one, versus having a compare-to-zero if-statement?

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  • When to use Python special methods?

    - by bodacydo
    I know that classes can implement various special methods, such as __iter__, __setitem__, __len__, __setattr__, and many others. But when should I use them? Can anyone describe typical scenarios when I would want to implement them and they would simplify programming in Python? Thanks, Boda Cydo.

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  • Converting from a string to boolean in Python?

    - by Joan Venge
    Does anyone know how to do convert from a string to a boolean in Python? I found this link. But it doesn't look like a proper way to do it. I.e. using a built in functionality, etc. EDIT: The reason I asked this is because I learned int("string"), from here. I tried bool ("string") but always got True.

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  • Google Appengine: Java or Python

    - by husayt
    We are going to use Google Appengine platform for our next big web project.But we are not sure which flavour to use: Java or Python. Could you please, advise on cons and pros of each approach? Which is the best way in order to build more scalable and efficient solution quicker. Thanks in advance

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