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Pandas DataFrame Groupby two columns and get counts
I have a pandas dataframe in the following format:
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How to install packages offline?
What's the best way to download a python package and it's dependencies from pypi for offline installation on another machine? Is there any easy way to do this with pip or easy_install? I'm trying to install the requests library on a FreeBSD box that is not connected to the internet.
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MS-DOS Batch file pause with enter key
Is it possible in MS-DOS batch file to pause the script and wait for user to hit enter key?
5 Answers
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How do I declare an array of weak references in Swift?
...gt;.weakObjects()
NSHashTable Class Reference
Available in OS X v10.5 and later.
Available in iOS 6.0 and later.
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unix diff side-to-side results?
How can I plot the results of a unix diff command side-to-side instead of one difference after the other? See below for an example:
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How do I split a string, breaking at a particular character?
...w York", "NY", "12345"]
I supposed a read-only reference for values and used the const declaration.
Enjoy ES6!
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How to send only one UDP packet with netcat?
I want to send only one short value in a UDP packet, but running the command
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Difference between framework vs Library vs IDE vs API vs SDK vs Toolkits? [closed]
...for developing (such as forms designers, resource editors, etc), compiling and debugging applications. e.g Eclipse, Visual Studio.
A Library is a chunk of code that you can call from your own code, to help you do things more quickly/easily. For example, a Bitmap Processing library will provide faci...
How to use android emulator for testing bluetooth application?
...ng. The code is working fine for real devices, but I want to run it on the Android Emulator. How can I use the emulator for bluetooth testing?
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How to deal with a slow SecureRandom generator?
If you want a cryptographically strong random numbers in Java, you use SecureRandom . Unfortunately, SecureRandom can be very slow. If it uses /dev/random on Linux, it can block waiting for sufficient entropy to build up. How do you avoid the performance penalty?
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