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Sort a list by multiple attributes?
... can be a function that returns a tuple:
s = sorted(s, key = lambda x: (x[1], x[2]))
Or you can achieve the same using itemgetter (which is faster and avoids a Python function call):
import operator
s = sorted(s, key = operator.itemgetter(1, 2))
And notice that here you can use sort instead of...
IDEA: javac: source release 1.7 requires target release 1.7
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18 Answers
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When is “i += x” different from “i = i + x” in Python?
...ts than the standard notation of i = i + . Is there a case in which i += 1 would be different from i = i + 1 ?
3 Answer...
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...i]);
//为指定节点的新建属性并赋值
node.SetAttribute("id","11111");
//为指定节点添加子节点
root.AppendChild(node);
//获取指定节点的指定属性值
string id=node.Attributes["id"].Value;
//获取指定节点中的文本
string content=node.InnerText;
//...
In Intellij, how do I toggle between camel case and underscore spaced?
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191
I use a plugin called String Manipulation which has the capabilities you're looking for (and m...
Python - Create list with numbers between 2 values?
...es I put in?
For example, the following list is generated for values from 11 to 16:
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Why does the order of the loops affect performance when iterating over a 2D array?
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You have a 2-dimensional array, but memory in the computer is inherently 1-dimensional. So while you imagine your array like this:
0,0 | 0,1 | 0,2 | 0,3
----+-----+-----+----
1,0 | 1,1 | 1,2 | 1,3
----+-----+-----+----
2,0 | 2,1 | 2,2 | 2,3
Your computer stores it in memory as a single line:
0...
What's the simplest way to test whether a number is a power of 2 in C++?
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Why is GHC so large/big?
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It's a bit silly really. Every library that comes with GHC is provided in no less than 4 flav...
Why does (1 in [1,0] == True) evaluate to False?
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