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pandas GroupBy columns with NaN (missing) values
...s far result in potentially dangerous behavior as it is quite possible you select a dummy value that is actually part of the dataset. This is increasingly likely as you create groups with many attributes. Simply put, the approach doesn't always generalize well.
A less hacky solve is to use pd.drop_...
How do you select a particular option in a SELECT element in jQuery?
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A selector to get the middle option-element by value is
$('.selDiv option[value="SEL1"]')
For an index:
$('.selDiv option:eq(1)')
For a known text:
$('.selDiv option:contains("Selection 1")')
EDIT: As commented above t...
Extract subset of key-value pairs from Python dictionary object?
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This answer uses a dictionary comprehension similar to the selected answer, but will not except on a missing item.
python 2 version:
{k:v for k, v in bigDict.iteritems() if k in ('l', 'm', 'n')}
python 3 version:
{k:v for k, v in bigDict.items() if k in ('l', 'm', 'n')}
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How to configure PostgreSQL to accept all incoming connections
...s you have to reload the configuration. One way to do this is execute this SELECT as a superuser.
SELECT pg_reload_conf();
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Create a .txt file if doesn't exist, and if it does append a new line
... answered Jan 31 '18 at 19:38
R.ChaR.Cha
62566 silver badges1212 bronze badges
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Replace all 0 values to NA
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but what if in the columns 6 and 7 - the datatype is char and no replacement should be done. In my problem, I need replacement only in columns 12 to 15 but the whole df has 21 columns (many must not be touched at all).
– userJT
Feb 20 '15 ...
.gitignore for Visual Studio Projects and Solutions
.... In Visual Studio 2017, you can just right click on the solution file and select Add solution to source control
This will add two files to your source folder.
.gitattributes
.gitignore
This is the easiest way.
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How to make a .jar out from an Android Studio project
...enerated jar into your required project's lib folder-->right click-->select "add as library"
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Recent file history in Vim?
...a lot of keys.. first to get a list of files, then to press q, and then to select a number. I believe the MRU plugin mentioned below is much better: stackoverflow.com/a/3171323/4752883 you have to press <leader> f, then either browse to the file with hjkl or other keys/search for the file nam...
Word-wrap in an HTML table
...uld potentially preprocess the text and wrap only long words (say, > 40 chars) in the <span>.
– nornagon
Jun 2 '11 at 8:30
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