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How to do a scatter plot with empty circles in Python?

In Python, with Matplotlib, how can a scatter plot with empty circles be plotted? The goal is to draw empty circles around some of the colored disks already plotted by scatter() , so as to highlight them, ideally without having to redraw the colored circles. ...
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How to use the “number_to_currency” helper method in the model rather than view?

I would like to use to_dollar method in my model like this: 11 Answers 11 ...
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?

Can someone give me a quick summary of what a ViewModelLocator is, how it works, and what the pros/cons are for using it compared to DataTemplates? ...
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Is it pythonic to import inside functions?

... In the long run I think you'll appreciate having most of your imports at the top of the file, that way you can tell at a glance how complicated your module is by what it needs to import. If I'm adding new code to an existing file I'll usually do the import where it's neede...
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Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…

I am trying to convert a timestamp of the format 2009-09-12 20:57:19 and turn it into something like 3 minutes ago with PHP. ...
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Representing graphs (data structure) in Python

How can one neatly represent a graph in Python ? (Starting from scratch i.e. no libraries!) What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient? One must be able to do various graph operations on it. As pointed out, the various graph representations...
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mongodb group values by multiple fields

For example, I have these documents: 3 Answers 3 ...
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Setting an object to null vs Dispose()

I am fascinated by the way the CLR and GC works (I'm working on expanding my knowledge on this by reading CLR via C#, Jon Skeet's books/posts, and more). ...
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Catching error codes in a shell pipe

I currently have a script that does something like 4 Answers 4 ...
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How to get a ListBox ItemTemplate to stretch horizontally the full width of the ListBox?

I want to have the ListItems to extend with their orange background the full width of the Listbox. 6 Answers ...