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Multiple aggregations of the same column using pandas GroupBy.agg()

...rns op1 op2 dummy 1 0.328953 0.032895 Or, df.groupby("dummy")['returns'].agg([('op1', 'sum'), ('op2', 'mean')]) op1 op2 dummy 1 0.328953 0.032895 ...
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NSInvocation for Dummies?

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
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What does `dword ptr` mean?

...e correct section. Basically, it means "the size of the target operand is 32 bits", so this will bitwise-AND the 32-bit value at the address computed by taking the contents of the ebp register and subtracting four with 0. s...
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Can iterators be reset in Python?

...rtelli 724k148148 gold badges11261126 silver badges13241324 bronze badges 6 ...
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How to remove duplicate white spaces in string using Java?

How to remove duplicate white spaces (including tabs, newlines, spaces, etc...) in a string using Java? 9 Answers ...
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What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]

...a == c); } } we have on the constant pool: #2 = String #32 // abc [...] #32 = Utf8 abc and main: 0: ldc #2 // String abc 2: astore_1 3: ldc #2 // String abc 5: astore_2 6: new #3 // class java/lang/St...
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TimeStamp on file name using PowerShell

...will want. – mwfearnley Apr 9 at 10:32 add a comment  |  ...
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How to update Python?

...nswers are for the same bit-versions, and by bit-version I mean 64-bit vs. 32-bit. For example, these answers would apply to updating from 64-bit Python-2.7.10 to 64-bit Python-2.7.11, ie: the same bit-version. While it is possible to install two different bit versions of Python together, it would r...
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Android: ListView elements with multiple clickable buttons

...hank you! – Shehaaz Jun 1 '13 at 23:32 13 it would be great to have answers in SO itself and not ...
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C++ “virtual” keyword for functions in derived classes. Is it necessary?

With the struct definition given below... 9 Answers 9 ...