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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]:
a b A1 A2
0 1 2 2 3
1 2 3 4 6
2 3 4 6 9
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How can I get name of element with jQuery?
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To read a property of an object you use .propertyName or ["propertyName"] notation.
This is no ...
console.log javascript [Function]
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140
If it's a user defined function you can use:
console.log(callback.toString());
Otherwise you...
Convert a string to int using sql query
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4 Answers
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How to open a file for both reading and writing?
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4 Answers
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jQuery - If element has class do this
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edited Oct 25 '17 at 18:41
answered Dec 30 '10 at 18:16
K...
Chrome debugging - break on next click event
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mvermand
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answered Sep 18 '13 at 18:45
Konrad DzwinelKo...
Write string to text file and ensure it always overwrites the existing content.
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Python - json without whitespaces
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answered May 1 '13 at 1:45
donghyun208donghyun208
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Does List guarantee insertion order?
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UuDdLrLrSs
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answered Jun 25 '09 at 10:07
BevanBevan
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