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How to access pandas groupby dataframe by key

...group method: In [21]: gb.get_group('foo') Out[21]: A B C 0 foo 1.624345 5 2 foo -0.528172 11 4 foo 0.865408 14 Note: This doesn't require creating an intermediary dictionary / copy of every subdataframe for every group, so will be much more memory-efficient that creating...
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Using .NET, how can you find the mime type of a file based on the file signature not the extension

... answered Sep 12 '08 at 9:44 Steve MorganSteve Morgan 12.4k22 gold badges3838 silver badges4949 bronze badges ...
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Why switch is faster than if

... answered Jul 15 '11 at 10:56 DanielDaniel 25.2k1616 gold badges8484 silver badges128128 bronze badges ...
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Join a list of strings in python and wrap each string in quotation marks

...ords = ['hello', 'world', 'you', 'look', 'nice'] >>> ', '.join('"{0}"'.format(w) for w in words) '"hello", "world", "you", "look", "nice"' share | improve this answer | ...
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How to add a spinner icon to button when it's in the Loading state?

... 101 If you look at the bootstrap-button.js source, you'll see that the bootstrap plugin replaces th...
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An efficient way to transpose a file in Bash

..." "a[i,j]; } print str } }' file output $ more file 0 1 2 3 4 5 6 7 8 9 10 11 $ ./shell.sh 0 3 6 9 1 4 7 10 2 5 8 11 Performance against Perl solution by Jonathan on a 10000 lines file $ head -5 file 1 0 1 2 2 3 4 5 3 6 7 8 4 9 10 11 1 0 1 2 $ wc -l < file 10000 $ ti...
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Best practices/guidance for maintaining assembly version numbers

...context we use TeamCity and Subversion/Git. TeamCity is free for a small (10) number of projects and is a very good build server but there are others, some of which are completely free. What a version number means What a version means to one person may mean something different to another, the gene...
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How exactly does the python any() function work?

... that lst is the iterable, which is a list of some items. If it contained [0, False, '', 0.0, [], {}, None] (which all have boolean values of False) then any(lst) would be False. If lst also contained any of the following [-1, True, "X", 0.00001] (all of which evaluate to True) then any(lst) would b...
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Algorithm to detect corners of paper sheet in photo

... John_West 2,06944 gold badges2020 silver badges3737 bronze badges answered Jul 10 '11 at 22:47 Daniel CrowleyDani...
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WPF ToolBar: how to remove grip and overflow

... answered Jun 26 '09 at 20:57 rmoorermoore 14.2k44 gold badges5656 silver badges5959 bronze badges ...