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What exactly does += do in python?

I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python. ...
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Alternative to google finance api [closed]

I wanted to use Google Finance API to get stock data about the company but this API is deprecated since 2011/26/05. 5 Answe...
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How can I run a directive after the dom has finished rendering?

I've got a seemingly simple problem with no apparent (by reading the Angular JS docs) solution. 6 Answers ...
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With ng-bind-html-unsafe removed, how do I inject HTML?

I'm trying to use $sanitize provider and the ng-bind-htm-unsafe directive to allow my controller to inject HTML into a DIV. ...
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Check if my app has a new version on AppStore

I would like to manually check if there are new updates for my app while the user is in it, and prompt him to download the new version. Can I do this by checking the version of my app in the app store - programatically? ...
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Why are arrays covariant but generics are invariant?

From Effective Java by Joshua Bloch, 9 Answers 9 ...
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How to dismiss the dialog with click on outside of the dialog?

I have implemented a custom dialog for my application. I want to implement that when the user clicks outside the dialog, the dialog will be dismissed. What do I have to do for this? ...
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Fastest way to check if a value exists in a list

What is the fastest way to know if a value exists in a list (a list with millions of values in it) and what its index is? 1...
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Why do Python's math.ceil() and math.floor() operations return floats instead of integers?

Can someone explain this (straight from the docs - emphasis mine): 8 Answers 8 ...
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Named placeholders in string formatting

In Python, when formatting string, I can fill placeholders by name rather than by position, like that: 19 Answers ...