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How do I retrieve the number of columns in a Pandas data frame?

How do you programmatically retrieve the number of columns in a pandas dataframe? I was hoping for something like: 6 Answer...
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Installing MSBuild 4.0 without Visual Studio 2010

I installed .NET 4.0 and VS 2010 RC on my laptop and MSBuild was automatically installed. I was hoping to build a continuous integration server by just installing the .NET SDK without VS 2010, so I downloaded the .NET 4.0 Framework from Microsoft at this link . Unfortunately, it doesn't appear to...
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Android set height and width of Custom view programmatically

I have created a custom view named Graphview . Here is the structure for the GraphView class. 6 Answers ...
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How can I get a list of build targets in Ant?

My codebase has a long build.properties file written by someone else. I want to see the available built targets without having to search through the file manually. Does ant have a command for this - something like ant show-targets - that will make it list all the targets in the build file? ...
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Start service in Android

I want to call a service when a certain activity starts. So, here's the Service class: 5 Answers ...
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Contributing to project on github, how to “rebase my pull request on top of master”

Ok so I an contributing to a project on github. The project on github is upstream , my forked repo on github is origin , and my local repo on my computer. ...
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What Product Flavor does Android Studio build by default in build.gradle?

We have an Android project that uses the new Gradle build system, and we use Android Studio as a development tool. When there are several product flavors specified in build.gradle , we notice that Android Studio builds the first one specified alphabetically. Is there a way to tell Android Studio to...
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RuntimeError on windows trying python multiprocessing

... am trying my very first formal python program using Threading and Multiprocessing on a windows machine. I am unable to launch the processes though, with python giving the following message. The thing is, I am not launching my threads in the main module. The threads are handled in a separate modul...
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What is the difference between Reader and InputStream?

What is the difference between Reader and InputStream? And when to use what? If I can use Reader for reading characters why I will use inputstream, I guess to read objects? ...
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How do I specify different Layouts in the ASP.NET MVC 3 razor ViewStart file?

I would like to have 2 separate Layouts in my application. Let's say one is for the Public section of the website and the other is for the Member side. ...