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How do I create a Python function with optional arguments?

I have a Python function which takes several arguments. Some of these arguments could be omitted in some scenarios. 2 Answe...
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How can I add a table of contents to a Jupyter / JupyterLab notebook?

... answered Jan 16 '14 at 8:36 IanIan 1,3271212 silver badges1313 bronze badges ...
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#1071 - Specified key was too long; max key length is 767 bytes

When I executed the following command: 34 Answers 34 ...
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Aggregate / summarize multiple variables per group (e.g. sum, mean)

From a data frame, is there a easy way to aggregate ( sum , mean , max et c) multiple variables simultaneously? 8 Answer...
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Difference between Activity and FragmentActivity

I was working on fragments and came across two things Activity and FragmentActivity which are used several times. I want to know that is there any difference between these two, because when I changed Activity with FragmentActivity , it had no effect on the app. ...
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How to clear the canvas for redrawing

...ncing time by aliasing frequently used properties (especially inside of an animation loop). – Prestaul Oct 25 '12 at 18:05 ...
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Ineligible Devices section appeared in Xcode 6.x.x

After installing Xcode 6 my devices moved to greyed-out section Ineligible Devices and I can't select them as deploy target: ...
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Missing XML comment for publicly visible type or member

I am getting this warning: "Missing XML comment for publicly visible type or member". 16 Answers ...
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CSS two divs next to each other

I want to put two <div> s next to each other. The right <div> is about 200px; and the left <div> must fill up the rest of the screen width? How can I do this? ...
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How can I use pickle to save a dict?

... pickle format to the given file. See the Pickler docstring for the meaning of optional argument proto. share | improve this answer | follow | ...