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How To Check If A Key in **kwargs Exists?

Python 3.2.3. There were some ideas listed here , which work on regular var's, but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists? ...
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Global and local variables in R

I am a newbie for R, and I am quite confused with the usage of local and global variables in R. 3 Answers ...
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How to multiply duration by integer?

To test concurrent goroutines, I added a line to a function to make it take a random time to return (up to one second) 5 An...
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In JavaScript, does it make a difference if I call a function with parentheses?

I noticed a difference when calling a function with empty parentheses, or without any parentheses at all. However, I am not passing any arguments to the function so I wondered, what would be the difference between: ...
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In which situations do we need to write the __autoreleasing ownership qualifier under ARC?

I'm trying to complete the puzzle. 3 Answers 3 ...
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In C# what is the difference between a destructor and a Finalize method in a class?

What is the difference, if there is one, between a destructor and a Finalize method in a class? 3 Answers ...
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How to print to console in pytest?

... (test-driven development) with pytest . pytest will not print to the console when I use print . 6 Answers ...
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promise already under evaluation: recursive default argument reference or earlier problems?

Here is my R code. The functions are defined as: 4 Answers 4 ...
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How to require a controller in an angularjs directive

Can anyone tell me how to include a controller from one directive in another angularJS directive. for example I have the following code ...
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When would you use .git/info/exclude instead of .gitignore to exclude files?

I am a bit confused about the pros and cons of using .git/info/exclude and .gitignore to exclude files. 4 Answers ...