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• Speaker at the German Visual FoxPro Developer Conference 2003

  The following is an excerpt from the UniversalThread conference coverage of the German Visual FoxPro Developer Conference 2003 written by Hans-Otto Lochmann and Armin Neudert. Track: Visual FoxPro and Linux This track consists of 4 sessions presented on one day in one sequence. Originally the Linux portion of this track was to be presented by Whil Hentzen, the well-known publisher, book author and confer-ence speaker. Unfortunately some illness prevented him from joining this DevCon. Rainer got the bad news only on early Friday morning. It was definitely to late to find a replacement among the already invited speaker on such a short notice. So Rainer decided to take over these "three sessions in a row" by himself with "a little help from his friends". He hired a coach for him for the weekend and prepared slides and sessions by himself - the originally planed slides and session material were still in USA. Rainer survived barely an endless disaster of C0000005's due to various wrong configuration settings... At the presentation Jochen Kirstätter helped massively with technical details regarding Linux whereas Rainer did the slides and the presentation. Gerold Lübben then presented the MySQL part - as originally planned. This track concentrated on the how to run Visual FoxPro applications on Linux machines with the help of a Windows emulator like Wine. As more and more people use Linux machines in production (and not just for running servers), more and more invitations to bid for a development job includes the requirement to run the application in a Linux environment. If you would like to participate in such submissions, then you should get familiar with the open source operating system Linux and the open source Data Base system MySQL. [...] These sessions provided a broad, complete overview of where Linux fits into the current computing landscape from the perspective of a VFP developer, where VFP can be used with Linux, and a conceptual plan for how to approach the incorporation of Linux into your day-to-day work. In order for you to be able to work with a Linux back end, you're going to need to know something about how Linux works. The best way involves a two-step process: First, plunk down a Linux workstation on your desk next to your Windows machine and develop some experience with the new OS.Second, once you have a basic level of comfort with Linux, gained through your experience on a workstation, leverage that knowledge and learn to connect to a Linux server from your Windows machine. This track showed both of these processes: What you can expect when you set up your Linux work-station, how to set it up, how to connect to your Windows network, how to fit VFP into the mix, and even how you could use it to replace your Windows workstation in some cases. Also this track demonstrated how to connect to an existing Linux server, running MySQL or an another back end, and how to get your VFP apps talking to that back end data. This track also showed both of the positions you can take. Rainer disliked it wholeheartedly (the bad guy position in these talks) and Jochen loved it (the good guy and "typical Linux techie"-position we all love). These opposite position lasted for three sessions and both sides where shown with their Pros and Cons in live and lively discussions of the speakers (club banging was forbidden). Gerold Luebben showed how Visual Foxpro and MySQL can work together. MySQL is as one the most well known open SOURCE databases for nearly all platforms available. Particularly in eBusiness MySQL is well positioned and well known for its performance and its stability. Still we like Visual FoxPro more - for sure . [...]

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• HTML5 Boilerplate template for ASP.NET with Visual Studio 2010

  - by Harish Ranganathan

  This is the 5th post in the series of HTML5 for ASP.NET Developers  Support for HTML5 in Visual Studio 2010 has been quite good with Visual Studio Service Pack 1 However, HTML5 Boilerplate template has been one of the most popular HTML5 templates out in the internet.  Now, there is one for your favorite ASP.NET Webforms as well as ASP.NET MVC 3 Projects (even for ASP.NET MVC 2).  And its available in the most optimal place, i.e. NuGet. Lets see it in action.  Let us fire up Visual Studio 2010 and create a “File – New Project – ASP.NET Web Application” and leave the default name to create the project.  The default project template creates Site.Master, Default.aspx and the Account (membership) files. When you run the project without any changes, it shows up the default Master Page with the Home and About placeholder pages. Also, just to check the rendering on devices, lets try running the same page in Windows Phone 7 Emulator.  You can download the SDK from here Clearly, it looks bad on the emulator and if we were to publish the application as is, its going to be the same experience when users browse this app. Close the browser and then switch to Visual Studio.   Right click on the project and select “Manage NuGet Packages” The NuGet Package Manager dialog opens up.  Search for HTML5 Boilerplate.  The options for MVC & Web Forms show up.  Click on Install corresponding to the “Add HTML5 Boilerplate to Web Forms” options. It installs the template in a few seconds.   Once installed, you will be able to see a lot of additional Script files and also the all important HTML5Boilerplate.Master file.  This would be the replacement for the default Site.Master.  We need to change the Content Pages (Default.aspx & other pages) to point to this Master Page.  Example <%@ <% Master Language="C#" AutoEventWireup="true" CodeBehind="Html5Boilerplate.Master.cs" Inherits="WebApplication14.SiteMaster" %> would be the setting in the Default.aspx Page. You can do a Find & Replace for Site.Master to HTML5Boilerplate.Master for the whole solution so that it is changed in all the locations. With this, we have our Webforms application ready with HTML5 capabilities.  Needless to say, we need to wire up HTML5 mark up level code, canvas, etc., further to use the actual HTML5 features, but even without that, the page is now HTML5’ed.   One of the advantages of HTML5 (here HTML5 is collectively referred for CSS3, Javascript enhancements etc.,)  is the ability to render the pages better on mobile and hand held devices. So, now when we run the page from Visual Studio, the following is what we get.  Notice the site.icon automatically added.  The page otherwise looks similar to what it was earlier. Now, when we also check this page on the Windows Phone Emulator, here below is what, we get. As you can see, we definitely get a better experience now.  Of course, this is not the only HTML5 feature that we can use.  We need to wire up additional code for using Canvas, SVG and other HTML5 features.  But, definitely, this is a good starting point. You can also install the HTML5boilerplate Template for your ASP.NET MVC 3 and ASP.NET MVC 2 from the NuGet packages and get them ready for HTML5. Cheers !!!

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• Review&ndash;Build Android and iOS apps in Visual Studio with Nomad

  - by Bill Osuch

  Nomad is a Visual Studio extension that allows you build apps for both Android and iOS platforms in Visual Studio using HTML5. There is no need to switch between .Net, Java and Objective-C to target different platforms - write your code once in HTML5 and build for all common mobile platforms and tablets. You have access to the native hardware functions (such as camera and GPS) through the PhoneGap library, UI libraries such as jQuery mobile allow you to create an impressive UI with minimal work. Nomad is still in an early access beta stage, so the documentation is a bit sparse. In fact, the only documentation is a simple series of steps on how to install the plug-in, set up a project, build and deploy it. You're going to want to be a least a little familiar with the PhoneGap library and jQuery mobile to really tap into the power of this. The sample project included with the download shows you just how simple it is to create projects in Visual Studio. The sample solution comes with an index.html file containing the HTML5 code, the Cordova (PhoneGap) library, jQuery libraries, and a JQuery style sheet: The html file is pretty straightforward. If you haven't experimented with JQuery mobile before, some of the attributes (such as data-role) might be new to you, but some quick Googling will fill in everything you need to know. The first part of the file builds a simple (but attractive) list with some links in it: The second part of the file is where things get interesting and it taps into the PhoneGap library. For instance, it gets the geolocation position by calling position.coords.latitude and position.coords.longitude: ...and then displays it in a simple span: Building is pretty simple, at least for Android (I'm not an iOS developer so I didn't look at that feature) - just configure the display name, version number, and package ID. There's no need to specify Android version; Nomad supports 2.2 and later. Enter these bits of information, click the new "Build for Android" button (not the regular Visual Studio Build link...) and you get a dialog box saying that your code is being built by their cloud build service (so no building while away from a WiFi signal apparently). After a couple minutes you wind up with a .apk file that can be copied over to your device. Applications built with Nomad for Android currently use a temporary certificate, so you can test the app on your devices but you cannot publish them in the Google Play Store (yet). And I love the "success" dialog box: Since Nomad is still in Beta, no pricing plans have been announced yet, so I'll be curious to see if this becomes a cost-effective solution to mobile app development. If it is, I may even be tempted to spring for the $99 iOS membership fee! In the meantime, I plan to work on porting some of my apps over to it and seeing how they work. My only quibble at this time is the lack of a centralized documentation location - I'd like to at least see which (if any) features of JQuery and PhoneGap are limited or not supported. Also, some notes on targeting different Android screen sizes would be nice, but it's relatively easy to find jQuery examples out on the InterWebs. Oh well, trial and error! You can download the Nomad extension for Visual Studio by going to their web site: www.vsnomad.com. Technorati Tags: Android, Nomad

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• Profiling Silverlight Applications after installing Visual Studio 2010 Service Pack 1

  - by mbcrump

  Introduction Now that the dust has settled and everyone has downloaded and installed Visual Studio 2010 Service Pack 1, its time to talk about a new feature included that will help Silverlight Developers profile their applications. Let’s take a look at what the official documentation says about it: Performance Wizard for Silverlight – taken from VS2010 SP1 KB. Visual Studio 2010 SP1 enables you to tune the Silverlight application performance by profiling the code. A traditional code profiler cannot tune the rendering performance for Silverlight applications. Many higher-level profilers are added to Visual Studio 2010 SP1 so that you can better determine which parts of the application consume time. So, how do you do it? After you finish installing VS2010 SP1, make sure it took by going to Help –> About. You should see SP1Rel under Visual Studio 2010 as shown below. Now, that we have verified you are on the most current release, let’s load up a Silverlight Application. I’m going to take my hobby Silverlight project that I created a month or so ago. The reason that I’m picking this project is that I didn’t focus so much on performance as it was just built for fun and to see what I could do with Silverlight. I believe this makes the perfect application to profile.  After the project is loaded, click on Analyze then Launch Performance Wizard. Go ahead and click on CPU Sampling (recommended). You will notice that it ask which application to target. By Default, it will select the .Web project in an Silverlight Application. Go ahead and leave the default Web Project checked. We are going to leave the client as Internet Explorer. Now, go ahead and click finish. Now your Silverlight Application will launch. While your application is running, you will see the following inside of Visual Studio 2010. Here is where you will need to attach your Silverlight Application to the web application that is current being profiled. Simply click on the  Attach/Detach button below and find your application to attach to the profiler. In my case, I am using IE8 and could find it by the title. After you close your browser, you will notice it generated a report: These files will end with a .VSP If you click on the .VSP you will it generated the following report: We could turn off “Just My Code” but it may pick up things that we didn’t want to profile as shown below: One other feature to note is that you may want to export the data to a CSV or XML. You can do that by looking at the toolbar and clicking the button highlighted below. Conclusion The profiler for Silverlight is a great addition to an already great product. So before you ship a Silverlight Application run it through the profile and see what comes up. Since its included and free I can’t see a reason not to do this. Thanks again for reading and I hope you subscribe to my blog or follow me on Twitter for more Silverlight/WP7 fun.  Subscribe to my feed

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• Python: How to display the calculated MD5 value in my browser?

  - by brilliant

  Hello, I was given this Python code that would calculate an MD5 value for any phrase: import md5 md5.new("Nobody inspects the spammish repetition").digest() (The phrase here is: "Nobody inspects the spammish repetition") What I want to do is display this value in my browser. How do I do it in Python? I tried all these variants, none of them worked: import md5 show = md5.new("Nobody inspects the spammish repetition").digest() print show import md5 print md5.new("Nobody inspects the spammish repetition").digest() import md5 md5.new("Nobody inspects the spammish repetition").digest() print md5 import md5 md5.new("Nobody inspects the spammish repetition").digest() print md5.new

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• Why does Python output a string and a unicode of the same value differently?

  - by Thierry Lam

  I'm using Python 2.6.5 and when I run the following in the Python shell, I get: >>> print u'Andr\xc3\xa9' André >>> print 'Andr\xc3\xa9' André >>> What's the explanation for the above? Given u'Andr\xc3\xa9', how can I display the above value properly in an html page so that it shows André instead of André?

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• How do I translate Ruby's IO.popen calls into Python's subprocess.Popen calls?

  - by Tom Morris

  I've read the documentation and I've tried lots of things in the REPL, and Googled, but I can't for the life of me understand how subprocess.Popen works in Python. Here is some Ruby code I am using: IO.popen("some-process") do |io| while(line = io.gets) # do whatever with line end end How do I translate this into Python using subprocess.Popen?

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• Python code to use a regular expression to make sure a string is alphanumeric plus . - _

  - by Warlax

  Hi, I looked and searched and couldn't find what I needed although I think it should be simple (if you have any Python experience, which I don't). Given a string, I want to verify, in Python, that it contains ONLY alphanumeric characters: a-zA-Z0-9 and . _ - examples: Accepted: bill-gates Steve_Jobs Micro.soft Rejected: Bill gates -- no spaces allowed [email protected] -- @ is not alphanumeric I'm trying to use: if re.match("^[a-zA-Z0-9_.-]+$", username) == True: But that doesn't seem to do the job...

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• How do I request and process JSON with python?

  - by sa125

  Hello - I am trying to send a GET request to a URL that I know returns data in the form of JSON using python. I would like to know how to send this request to http://someurl/path/to/json, and how to parse it - preferably to a python dict. thanks :)

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• What do I use for a max-heap implementation in Python?

  - by Douglas Mayle

  Python includes the heapq module for min-heaps, but I need a max heap. What should I use for a max-heap implementation in Python?

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• Why doesn't Python require exactly four spaces per indentation level?

  - by knorv

  Whitespace is signification in Python in that code blocks are defined by their indentation. Furthermore, Guido van Rossum recommends using four spaces per indentation level (see PEP 8: Style Guide for Python Code). What was the reasoning behind not requiring exactly four spaces per indentation level as well? Are there any technical reasons? It seems like all the arguments that can be made for making whitespace define code blocks can also be used to argument for setting an exact whitespace length for one indentation level (say four spaces).

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• How to give extra arguments for the Python itertools.ifilter function?

  - by Peter Smit

  In python I have the following function: def is_a_nice_element(element, parameter): #do something return True or False Now I would like to filter a list with this function as predicate, giving a fixed parameter. Python has the itertools.ifilter function, but I can't figure out how to pass the parameter. Is this possible? If not, how can I solve this problem?

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• Once I know the basic elements and syntax of Python, what should I do?

  - by Wyatt

  Well, I have read several user guides and watched dozens and dozens of video tutorials on how to program with Python, and feel pretty confident about writing simple applications for it. My main point in my question is, where would I be able to learn more advanced programming knowledge about Python?

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• How can I keep the system environments set by a bat file, which called by a python script

  - by Lucy

  I call .bat files in Python to set system environments, and check the system environments were set properly, and then back to run python code, the system environments are changed back to original. How can I solve this problem? I really appreciate any clues/answers Thanks in advanced

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• How do I parse a VCard to a Python dictionary?

  - by lecodesportif

  I'm trying to figure out how to parse a VCard to a Python dictionary using VObject. How do I convert vobj=vobject.readOne(vcard) into a Python dict? Sorry for asking such a basic question but I'm a beginner.

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• Why can't I find `len(list)` in Python?

  - by FarmBoy

  I'm new to Python. I have a method that begins: def foo(self, list): length = len(list) I've called len() successfully in other cases, but here I get: TypeError: object of type 'type' has no len() How do I convince Python that this object passed in is a list? What am I missing?

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• Is there a function in C that does the same as raw_input in Python?

  - by Rami Jarrar

  Is there a C function that does the same as raw_input in Python? #in Python:: x = raw_input("Message Here:") How can I write something like that in C?

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• What development tools should I use to develop in python?

  - by Spines

  What tools should I use to develop python applications in? I come from a C# background where I use Visual Studio, what is the Visual Studio of the python world?

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• Running a python script on all the files in a directory.

  - by S1syphus

  I have a Python script that reads through a text csv file and creates a playlist file. However I can only do one at a time, like: python playlist.py foo.csv foolist.txt However, I have a directory of files that need to be made into a playlist, with different names, and sometimes a different number of files. So far I have looked at creating a txt file with a list of all the names of the file in the directory, then loop through each line of that, however I know there must be an easier way to do it.

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• Is a variable swap guaranteed to be atomic in python?

  - by dhruvbird

  With reference to the following link: http://docs.python.org/faq/library.html#what-kinds-of-global-value-mutation-are-thread-safe I wanted to know if the following: (x, y) = (y, x) will be guaranteed atomic in cPython. (x and y are both python variables)

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• Any downsides to UPX-ing my 32-bit Python 2.6.4 development environment EXE/PYD/DLL files?

  - by Malcolm

  Are there any downsides to UPX-ing my 32-bit Python 2.6.4 development environment EXE/PYD/DLL files? The reason I'm asking is that I frequently use a custom PY2EXE script that UPX's copies of these files on every build. Yes, I could get fancy and try to cache UPXed files, but I think a simpler, safer, and higher performance solution would be for me to just UPX my Python 2.6.4 directory once and be done with it. Thoughts? Malcolm

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• Is it possible to write an IM server in python? (be able to handle the heavy connections)

  - by Kyle

  Hi all, i wanna write an IM server in python, but i'm not sure if python can handle the heavy connections? Thanks in advance.

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• Python : get all exe files in current directory and run them?

  - by Maciek

  Hey all, First of all this is not homework, I'm in a desperate need for a script that will do the following, my problem is, I've never had to deal with python before so I barely know how to use it - and I need it to launch unit tests in TeamCity via a commandline build runner What I need exactly is : a *.bat file that will run the script a python script that will : get all *_test.exe files in the current working directory run all the files which were the result of the search Best regards

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• How do I watch a folder for changes and when changes are done using Python?

  - by yakov

  i need to watch a folder for incoming files. i did that with the following help: http://stackoverflow.com/questions/182197/how-do-i-watch-a-file-for-changes-using-python the problem is that the files that are being moved are pretty big (10gb) and i want to be notified when all files are done moving. i tried comparing the size of the folder every 20 seconds but the file shows its correct size even tough windows shows that it is still moving. i am using windows with python

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• What are your "must-have" Python Packages for Finance?

  - by srid

  With the recent SEC proposal requiring that most Asset-Backed Securities issuers file a python computer program to document the flow of funds (or waterfall) provisions of the transaction, I thought it timely to ask what you thought the "Must-Have" Python Packages for Finance would be. PS: apart from answering here, please also consider answering this survey.

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