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Weighted random numbers

...e items have individual weights: 1) calculate the sum of all the weights 2) pick a random number that is 0 or greater and is less than the sum of the weights 3) go through the items one at a time, subtracting their weight from your random number, until you get the item where the random number is ...
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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column

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What ReSharper 4+ live templates for C# do you use? [closed]

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List comprehension rebinds names even after scope of comprehension. Is this right?

... 172 List comprehensions leak the loop control variable in Python 2 but not in Python 3. Here's Guid...
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App Inventor 2 软件著作权(软著)申请指南 · App Inventor 2 中文网

... 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
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Call apply-like function on each row of dataframe with multiple arguments from each row

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Converting integer to binary in python

... TrebledJ 6,23555 gold badges1919 silver badges4141 bronze badges answered May 2 '12 at 9:32 eumiroeumiro ...
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get list of pandas dataframe columns based on data type

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How do I check if a string is unicode or ascii?

...Unicode characters. There is a bytes type that holds raw bytes. In Python 2, a string may be of type str or of type unicode. You can tell which using code something like this: def whatisthis(s): if isinstance(s, str): print "ordinary string" elif isinstance(s, unicode): pri...
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Check if all elements in a list are identical

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