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cartesian product in pandas
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This won't win a code golf competition, and borrows from the previous answers - but clearly shows how the key is added, and how the join works. This creates 2 new data frames from lists, then adds the key to do the cartesian product on....
What exactly are DLL files, and how do they work?
...ere are 2 types of libraries. Static libraries and dynamic libraries. In windows the file extensions are as follows: Static libraries (.lib) and dynamic libraries (.dll). The main difference is that static libraries are linked to the executable at compile time; whereas dynamic linked libraries ar...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...ble. For security reasons, you cannot switch to kernel mode and execute arbitrary code - the traps are managed through a table of addresses that cannot be written to unless the CPU is running in supervisor mode. You trap with an explicit trap number and the address is looked up in the jump table; ...
How can I install pip on Windows?
... Newbies are no longer excluded from using community libraries by the prohibitive difficulty of setup. In shipping with a package manager, Python joins Ruby, Node.js, Haskell, Perl, Go—almost every other contemporary language with a majority open-source community. Thank you, Python.
If you do fin...
How to make good reproducible pandas examples
...if not fiddle around to see if you can make up a small DataFrame which exhibits the issue you are facing.
* Every rule has an exception, the obvious one is for performance issues (in which case definitely use %timeit and possibly %prun), where you should generate (consider using np.random.seed so ...
Is there a simple way to remove multiple spaces in a string?
...e modified on the first run, successive runs would be faster (if only by a bit). As this adds time, I added this string copy to the other two so that the times showed the difference only in the logic. Keep in mind that the main stmt on timeit instances will only be executed once; the original way ...
What are the key differences between Scala and Groovy? [closed]
...ight think. Groovy's real competition is JRuby and Jython.
Who's going to win? My crystal ball is as cracked as anybody else's.
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Base 64 encode and decode example code
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answered Sep 9 '11 at 10:41
Jon SkeetJon Skeet
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Pandas percentage of total with groupby
... It might, but it didn't work for me. Does pandas in Python 3 work a bit differently?
– dhardy
Feb 9 '15 at 9:59
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How to create an installer for a .net Windows Service using Visual Studio
How do I create an installer for a Windows Service that I have created using Visual Studio?
5 Answers
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