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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df.A.values,index=df.B).to_dict()
1000 loops, best of 3: 987 us per loop...
How do I convert a string to a double in Python?
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>>> x = "2342.34"
>>> float(x)
2342.3400000000001
There you go. Use float (which behaves like and has the same precision as a C,C++, or Java double).
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How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method
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edited Nov 3 '16 at 20:41
Peter Mortensen
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Is there any particular difference between intval and casting to int - `(int) X`?
...m which to convert. (int) cannot.
int intval( mixed $var [, int $base = 10 ] )
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Create a tag in a GitHub repository
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1590
You can create tags for GitHub by either using:
the Git command line, or
GitHub's web interfac...
Format decimal for percentage values?
...se the P format string. This will vary by culture:
String.Format("Value: {0:P2}.", 0.8526) // formats as 85.26 % (varies by culture)
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iterating over each character of a String in ruby 1.8.6 (each_char)
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edited Sep 28 '09 at 1:02
answered Sep 28 '09 at 0:55
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How do I find the number of arguments passed to a Bash script?
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answered Dec 12 '10 at 18:46
zsalzbankzsalzbank
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ValueError: numpy.dtype has the wrong size, try recompiling
...ABI backward compatibility. This happened (unintentionally) with numpy 1.4.0.
As a consequence, users that updated numpy to 1.4.0, had binary incompatibilities with all other compiled packages, that were compiled against a previous version of numpy. This requires that all packages with binary extens...
Insert text into textarea with jQuery
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edited Jun 3 '09 at 19:31
answered Jun 3 '09 at 19:22
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