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What is the difference between NaN and None?
...= pd.Series([1, None], dtype=object)
s_good = pd.Series([1, np.nan])
In [13]: s_bad.dtype
Out[13]: dtype('O')
In [14]: s_good.dtype
Out[14]: dtype('float64')
Jeff comments (below) on this:
np.nan allows for vectorized operations; its a float value, while None, by definition, forces object ty...
How do I install Python packages on Windows?
...environment so that you can use pip anywhere. It's somewhere like C:\Python33\Scripts.
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Remove the last line from a file in Bash
...$ d' foo.txt
The -i option does not exist in GNU sed versions older than 3.95, so you have to use it as a filter with a temporary file:
cp foo.txt foo.txt.tmp
sed '$ d' foo.txt.tmp > foo.txt
rm -f foo.txt.tmp
Of course, in that case you could also use head -n -1 instead of sed.
MacOS:
On M...
Python regex find all overlapping matches?
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Why should I prefer single 'await Task.WhenAll' over multiple awaits?
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edited Jun 25 '19 at 16:31
answered Aug 19 '13 at 10:02
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How can I open Windows Explorer to a certain directory from within a WPF app?
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Why not Process.Start(@"c:\test");?
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Cannot serve WCF services in IIS on Windows 8
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Callum Watkins
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answered Jul 12 '12 at 20:35
faesterfaester
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How do I detach objects in Entity Framework Code First?
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saluce
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answered Apr 8 '11 at 20:00
Ladislav MrnkaLadislav...
Dynamically creating keys in a JavaScript associative array
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edited Aug 3 '12 at 1:40
bkaid
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jQuery: select all elements of a given class, except for a particular Id
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edited Oct 25 '16 at 17:37
JonH
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answered M...