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How to get the last N rows of a pandas DataFrame?

I have pandas dataframe df1 and df2 (df1 is vanila dataframe, df2 is indexed by 'STK_ID' & 'RPT_Date') : 3 Answers ...
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`if __name__ == '__main__'` equivalent in Ruby

I am new to Ruby. I'm looking to import functions from a module that contains a tool I want to continue using separately. In Python I would simply do this: ...
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Compare integer in bash, unary operator expected

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Skip rows during csv import pandas

I'm trying to import a .csv file using pandas.read_csv() , however I don't want to import the 2nd row of the data file (the row with index = 1 for 0-indexing). ...
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Calculating sum of repeated elements in AngularJS ng-repeat

The script below displays a shop cart using ng-repeat . For each element in the array, it shows the item name, its amount and the subtotal ( product.price * product.quantity ). ...
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What is the use for Task.FromResult in C#

In C# and TPL ( Task Parallel Library ), the Task class represents an ongoing work that produces a value of type T. 6 Ans...
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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?

This is a question that came to mind while reading the brilliant answer by Mysticial to the question: why is it faster to process a sorted array than an unsorted array ? ...
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Failed to import new Gradle project: failed to find Build Tools revision *.0.0

When I boot up Android Studio and select "New Project..." and go through creating a new project, I get this popup error: 14...
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Regex not operator

Is there an NOT operator in Regexes? Like in that string : "(2001) (asdf) (dasd1123_asd 21.01.2011 zqge)(dzqge) name (20019)" ...
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How to determine if a number is a prime with regex?

I found the following code example for Java on RosettaCode : 4 Answers 4 ...