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  • How to build an interactive search engine web interface using python

    - by asmaier
    I have build a static web interface for searching data from some tables in my PostgreSQL database. The query website consists of a simple textfield for entering the search term, the result website presents the results as a simple html table. The server side code for searching the PostgreSQL database and returning the results is written in python using psycopg2. Now I would like to add some interactive "Ajax features" to my search engine. When entering the search term I would like to be able to see a list of possible search terms like Google does it. On the results page, I would like to be able to sort the table showing the results. What would be the easiest/recommended way to implement these features for my search engine web site? Do I need a full-fledged web framework like Django for that?

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  • Python GUI Scraper hanging issues.

    - by bball
    I wrote a scraper using python a while back, and it worked fine in the command line. I have made a GUI for the application now, but I am having trouble with one issue. When I attempt to update text inside the gui (e.g. 'fetching URL 12/50'), I am unable seeing as the function within the scraper is grabbing 100+ links. Also when going from one scraping function, to a function that should update the gui, to another function, the gui update function seems to be skipped over while the next scrape function is run. An example would be: scrapeLinksA() #takes 20 seconds updateInfo("LinksA done") scrapeLinksB() #takes another 20 seconds in the above example, updateInfo is never executed, unless I end the program with a KeyboardInterrupt. I'm thinking my solution is threading, but I'm not sure. What can I do to fix this? I am using: PyQt4 urllib2 BeautifulSoup

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  • Not-quite-JSON string deserialization in Python

    - by cpharmston
    I get the following text as a string from an XML-based REST API 'd':4 'ca':5 'sen':1 'diann':2,6,8 'feinstein':3,7,9 that I'm looking to deserialize into a pretty little Python dictionary: { 'd': [4], 'ca': [5], 'sen': [1], 'diann': [2, 6, 8], 'feinstein': [3, 7, 9] } I'm hoping to avoid using regular expressions or heavy string manipulation, as this format isn't documented and may change. The best I've been able to come up with: members = {} for m in elem.text.split(' '): m = m.split(':') members[m[0].replace("'", '')] = map(int, m[1].split(',')) return members Obviously a terrible approach, but it works, and that's better than anything else I've got right now. Any suggestions on better approaches?

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  • Python encoding - Nothing works

    - by Luiz Fernando
    I've been looking the answers here in this web site, but nothing have worked so far. The problem is: In the database, strings are saved like that one: at &#8730;s = 7 TeV with. And the reason is that the "escape" JavaScript function was used. I was not able to "unescape" these strings in Python yet. I tried to use "eval", "decode", "re.sub" and others, but without success. So please, which function can I use to get it right?

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  • python multithread "maximum recursion depth exceed"

    - by user293487
    I use Python multithread to realize Quicksort. Quicksort is implement in a function. It is a recursive function. Each thread calls Quicksort to sort the array it has. Each thread has its own array that stores the numbers needs to be sorted. If the array size is smaller (<10,000). It runs ok. However, if the array size is larger, it shows the "maximum recursion depth exceed". So, I use setrecursionlimit () function to reset the recursion depth to 1500. But the program crash directly...

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  • Python Solitaire

    - by Kevin
    This is more of a thought i had awhile rather than an actual problem to solve, maybe more a discussion, but i was wondering if it would be possible to design the game of solitaire and be abkle to play it in the python GUI or some other form of iterface? I know you can get a deck of cards fairly easily and i know yuo can play simple games like snap and so on but i thought solitaire would be more challenging and fun because there is alot more logic behind it than just laying out the cards randomly. Any ideas? (I would be intrested to hear about or see any solutions if anyone had any links etc..)

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  • python dict update diff

    - by adam
    Does python have any sort of built in functionality of notifying what dictionary elements changed upon dict update? For example I am looking for some functionality like this: >>> a = {'a':'hamburger', 'b':'fries', 'c':'coke'} >>> b = {'b':'fries', 'c':'pepsi', 'd':'ice cream'} >>> a.diff(b) {'c':'pepsi', 'd':'ice cream'} >>> a.update(b) >>> a {'a':'hamburger', 'b':'fries', 'c':'pepsi', 'd':'ice cream'} I am looking to get a dictionary of the changed values as shown in the result of a.diff(b)

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  • python unichr problem

    - by jacob
    I've got some problem with unichr() on my server. Please see below: On my server (Ubuntu 9.04): >>> print unichr(255) Traceback (most recent call last): File "<stdin>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode character u'\xff' in position 0: ordinal not in range(128) On my desktop (Ubuntu 9.10): >>> print unichr(255) ÿ I'm fairly new to python so I don't know how to solve this. Anyone care to help? Thanks.

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  • precompile App_LocalResources in Visual Studio

    - by jazbit
    My web-application project (not "web-site" project) is translated to 15 different languages using the ASP.NET's built-in resource engine (I have tons of *.aspx.resx file in the "App_LocalREsources" folder). All these resources are precompiled by ASP.NET when I first launch the application and it takes a LOT of time. A LOT. 5-10 minutes. I have to wait 5-10 minutes every time I make soe tiny change to my code to see how it works. Is there any way to compile these resource in Visual Studio? Changing the "Build Action" for all these resx-files to "Embedded resource" does not work :( (or I'm doing it wrong?) PS. I know I can write a batch file that will launch aspnet_compiler.exe and manually compile the app with all the resources, but thats a "hack". I need a documented "Visual Studio"-way to achieve this. Cause I have a setup-project for this app in the same solution, that picks up the "project output" of this web-app (and it won't pick-up any manually precompiled files I made)

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  • Convert data retrieved from MySQL database into JSON object using Python/Django

    - by rohanbk
    I have a MySQL database called People which contains the following schema <id,name,foodchoice1,foodchoice2>. The database contains a list of people and the two choices of food they wish to have at a party (for example). I want to create some kind of Python web-service that will output a JSON object. An example of output should be like: { "guestlist": [ {"id":1,"name":"Bob","choice1":"chicken","choice2":"pasta"},{"id":2,"name":"Alice","choice1":"pasta","choice2":"chicken"} ], "partyname": "My awesome party", "day": "1", "month": "June", "2010": "null" } Basically every guest is stored into a dictionary 'guestlist' along with their choices of food. At the end of the JSON object is just some additional information that only needs to be mentioned once. The question that I have is regarding the method that I need to utilize to grab the data from my database, and create the JSON object. Do I need to use a standard Model/View structure of Django or can I get away with something that is much simpler since what I need to do is really simple?

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  • Problem simulating a key press on Python for Symbian platform on a Nokia 5th ed phone

    - by abhishekbhardwaj007
    I am developing an app for Nokia 5800 Music Express (S60 5th edition) using PyS60 (Python for S60) ,I want to simulate a KeyPress say if a message comes,I detect a message and Press a Key. There does exist a Keypress module for PyS60 for 2nd edition phones which allows this. However I have not been able to install it on my 5th ed phone. Is this module portable? If yes then how do I install it (I get certificate error) and If no then any alternatives for simulating a key press on a 5th edition touch phone?

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  • Best practice for installing python modules from an arbitrary VCS repository

    - by fmark
    I'm newish to the python ecosystem, and have a question about module editing. I use a bunch of third-party modules, distributed on PyPi. Coming from a C and Java background, I love the ease of easy_install <whatever>. This is a new, wonderful world, but the model breaks down when I want to edit the newly installed module for two reasons: The egg files may be stored in a folder or archive somewhere crazy on the file system. Using an egg seems to preclude using the version control system of the originating project, just as using a debian package precludes development from an originating VCS repository. What is the best practice for installing modules from an arbitrary VCS repository? I want to be able to continue to import foomodule in other scripts.

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  • Setting up a SQL Membership Provider and attaching the MDF file in Visual Studio 2008

    - by aubreyrhodes
    I'm trying to set up a SQL Membership Provider for an ASP.NET MVC 1.0 and I'm having problems setting up the tables and stored procedures in the database. I've tried attaching both the applications current database and a blank database to my local SQLEXPRESS instance (using SSEUtil) and then running the aspnet_regsql wizard against them. When I detach the mdf file and try to load it in Visual Studio 2008, the data connection in the server explorer shows that the database has no tables or stored procedures. Am I missing a step or something here? I've been having a heap of trouble with compatibility between Visual Studio and SQLEXPRESS.

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  • math syntax checker written in python

    - by neurino
    All I need is to check, using python, if a string is a valid math expression or not. For simplicity let's say I just need + - * / operators (+ - as unary too) with numbers and nested parenthesis. I add also simple variable names for completeness. So I can test this way: test("-3 * (2 + 1)") #valid test("-3 * ") #NOT valid test("v1 + v2") #valid test("v2 - 2v") #NOT valid ("2v" not a valid variable name) I tried pyparsing but just trying the example: "simple algebraic expression parser, that performs +,-,*,/ and ^ arithmetic operations" I get passed invalid code and also trying to fix it I always get wrong syntaxes being parsed without raising Exceptions just try: >>>test('9', 9) 9 qwerty = 9.0 ['9'] => ['9'] >>>test('9 qwerty', 9) 9 qwerty = 9.0 ['9'] => ['9'] both test pass... o_O Any advice?

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  • Edit Distance in Python

    - by Alice
    I'm programming a spellcheck program in Python. I have a list of valid words (the dictionary) and I need to output a list of words from this dictionary that have an edit distance of 2 from a given invalid word. I know I need to start by generating a list with an edit distance of one from the invalid word(and then run that again on all the generated words). I have three methods, inserts(...), deletions(...) and changes(...) that should output a list of words with an edit distance of 1, where inserts outputs all valid words with one more letter than the given word, deletions outputs all valid words with one less letter, and changes outputs all valid words with one different letter. I've checked a bunch of places but I can't seem to find an algorithm that describes this process. All the ideas I've come up with involve looping through the dictionary list multiple times, which would be extremely time consuming. If anyone could offer some insight, I'd be extremely grateful. Thanks!

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  • in-memory database in Python

    - by Claudiu
    I'm doing some queries in Python on a large database to get some stats out of the database. I want these stats to be in-memory so other programs can use them without going to a database. I was thinking of how to structure them, and after trying to set up some complicated nested dictionaries, I realized that a good representation would be an SQL table. I don't want to store the data back into the persistent database, though. Are there any in-memory implementations of an SQL database that supports querying the data with SQL syntax?

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  • Next step for Python app using Sqlite db

    - by ChrisC
    I want to write a db program in Python using Sqlite. I have the db table structure planned, and am ready to move to the next step, which I think is to work any bugs out of the db structure. I am totally inexperienced in development except for writing the original db (written in MS Access), and an Intro to C++ class (OOP concepts and console C++ programs). Is it time to test the db structure? If so, what's the best way, and what tool(s) should I use? Thank you.

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  • Right way to create [self]respawning app in python

    - by grapescan
    I am using jabber bot written in python to log some MUC talks. Sometimes it drops on some network or XMPP problems. In this case I have to start it again by myself. The goal is to make it "self-respawning". I have some variants about how to do it. Bot is one process. Another process monitors its activity and starts it if bot died. Main process spawns bot subprocess and controls it. Also I think daemonizing bot process is useful here. Platform is Linux, as you could guess. What is the right way to solve this problem?

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  • Resizing image with Python with locked aspect ratio

    - by David Vinklar
    How should I resize an image with Python script so that it would automatically adjust the Height ratio to the Width used? I'm using the following code: def Do(Environment): # Resize App.Do( Environment, 'Resize', { 'AspectRatio': 1.33333, 'CurrentDimensionUnits': App.Constants.UnitsOfMeasure.Pixels, 'CurrentResolutionUnits': App.Constants.ResolutionUnits.PixelsPerIn, 'Height': 1440, 'MaintainAspectRatio': True, 'Resample': True, 'ResampleType': App.Constants.ResampleType.SmartSize, 'ResizeAllLayers': True, 'Resolution': 72, 'Width': 1920, }) Using this code works perfectly if the aspect ratio of an image is the same as the one defined in the code - i.e. 1.33333. But how should I make it work with images that do not have this ratio? For me, what is important is that the new Width is 1920; Height has to be able to adjust automatically. Any ideas which part of my code should be altered and how?

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  • Using Visual Studio for open source projects (projects management & legal issues)

    - by Goofy
    Hello! I'm working on small open source project for developed Windows. I created new project using Visual Studio wizard and now I want to publish it using subversion and develop it with friends. What projects' configuration files I have to add to repository to make my friends able to download current project's revision and open it in Visual Studio? List item University where I study is a member of Microsoft Academy Alliance project, which make students able to download legal copies of many Microsoft's products. Can I use this copy to develop open source project and publish created code in Internet?

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  • Python code formatting

    - by Curious2learn
    In response to another question of mine, someone suggested that I avoid long lines in the code and to use PEP-8 rules when writing Python code. One of the PEP-8 rules suggested avoiding lines which are longer than 80 characters. I changed a lot of my code to comply with this requirement without any problems. However, changing the following line in the manner shown below breaks the code. Any ideas why? Does it have to do with the fact that what follows return command has to be in a single line? The line longer that 80 characters: def __str__(self): return "Car Type \n"+"mpg: %.1f \n" % self.mpg + "hp: %.2f \n" %(self.hp) + "pc: %i \n" %self.pc + "unit cost: $%.2f \n" %(self.cost) + "price: $%.2f "%(self.price) The line changed by using Enter key and Spaces as necessary: def __str__(self): return "Car Type \n"+"mpg: %.1f \n" % self.mpg + "hp: %.2f \n" %(self.hp) + "pc: %i \n" %self.pc + "unit cost: $%.2f \n" %(self.cost) + "price: $%.2f "%(self.price)

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  • Python: wxpython wx.media.MediaCtrl - millisecond seek capability

    - by PPTim
    I've been searching for a media player that can display sub-second resolution in videos. Some pointed me to the Frame stepping functionality in MPC, but I'd like even more than that. I know from previous experience with wxPython that the wx.media.MediaCtrl both displays and (as fast as i can click with the mouse anyway) stops the video with millisecond-precision. The code is here, and runs no-problem with python +wxpython module. Has anyone come across other video players that handle this functionality, or has seen a more robust/developed video player written with wxPython that allows for this level of precision? This is possibily a one-off task so I'd like to use existing solutions if possible. Thanks.

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