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How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
I have a dataframe with ~300K rows and ~40 columns.
I want to find out if any rows contain null values - and put these 'null'-rows into a separate dataframe so that I could explore them easily.
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How can I extract a predetermined range of lines from a text file on Unix?
...y only used in conjunction with the -n command-line option.
n -
If auto-print is not disabled, print the pattern space, then, regardless, replace the pattern space with the next line of input. If
there is no more input then sed exits without processing any more
commands.
q -
Ex...
What does it mean when a CSS rule is grayed out in Chrome's element inspector?
...hich are applied to the currently selected element appear in normal text.
If a rule exists in that set but is not applied because it's a non-inheritable property (e.g. background color), it will appear as greyed/dimmed text.
here is an article that give a good explanation - (Note: the relevant ite...
Get url parameters from a string in .NET
...'s name says, it's to parse Query Strings, not URLs with query parameters. If you want to do it, you must first split it by ? like this: Url.Split('?') and get last element using (depending on situation and what you need) [0] or LINQ's Last() / LastOrDefault().
– Kosiek
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Can you target with css?
...u can set BR's border but you won't see it as it has no visual dimension.
If you like to visually separate two sentences, then you probably want to use the horizontal ruler which is intended for this goal. Since you cannot change the markup, I'm afraid using only CSS you cannot achieve this.
It se...
Python - Passing a function into another function
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And what if the function is a method on an object and uses a property of that object to do its work?
– CpILL
May 12 '15 at 2:33
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java.lang.OutOfMemoryError: Java heap space
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If you want to increase your heap space, you can use java -Xms<initial heap size> -Xmx<maximum heap size> on the command line. By default, the values are based on the JRE version and system configuration. You can ...
How do I get java logging output to appear on a single line?
...tS you can write %1$tF %1$tT . Makes it a little bit shorter. I don't know if it's even faster.
– Bruno Eberhard
Dec 28 '14 at 8:47
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Why use try {} finally {} with an empty try block?
...borted”. So in order to
guarantee that your processing
finishes even if your thread is
aborted in the middle by someone
calling Abort on your thread, you can
place all your code in the finally
block (the alternative is to write
code in the “catch” block to determine
where you w...
Undo git update-index --assume-unchanged
...other than 'H'/'h'. From git-scm.com/docs/git-ls-files: This option identifies the file status with the following tags (followed by a space) at the start of each line: H:: cached S:: skip-worktree M:: unmerged R:: removed/deleted C:: modified/changed K:: to be killed ?:: other
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