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pandas GroupBy columns with NaN (missing) values
...ng the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1).groupby('b').sum()
Out[12]:
a
b
-1 2
4 1
6 3
That said, this feels pretty awful hack... perhaps there should be an option to include NaN in groupby (see this github i...
python location on mac osx
...
[GCC 4.2.1 (Apple Inc. build 5646)] is the version of GCC that the Python(s) were built with, not the version of Python itself. That information should be on the previous line. For example:
# Apple-supplied Python 2.6 in OS X 1...
biggest integer that can be stored in a double
What is the biggest "no-floating" integer that can be stored in an IEEE 754 double type without losing precision ?
7 Answer...
Why NSUserDefaults failed to save NSMutableDictionary in iOS?
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answered Jan 23 '09 at 4:56
BlueDolphinBlueDolphin
9,5211717 gold badges5353 silver badges7171 bronze badges
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Hidden Features of Xcode 4
Now that Xcode 4 is officially released it's time for a follow up to my previous question: Hidden Features of Xcode
23 Ans...
Disable assertions in Python
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edited Sep 4 '19 at 20:41
answered Apr 27 '17 at 21:50
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Escape double quotes in parameter
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mousiomousio
9,02144 gold badges2828 silver badges4040 bronze badges
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NUnit isn't running Visual Studio 2010 code
...anged the target framework setting for all the projects to ".NET Framework 4.0". I then built the solution without any errors. I can now use the NUnit GUI app to run tests built for .NET 4.0. I've not done exhaustive testing of this build so there may be problems, but for my purposes it works fine.
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Scalar vs. primitive data type - are they the same thing?
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edited Jul 22 '15 at 13:48
kareman
69111 gold badge66 silver badges1616 bronze badges
answered Jul 8 '...
App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通义千问...等国...
... 2. 流式输出，边生成边显示
3. 显示思考过程
4. 多轮对话与重开一轮
5. 防止重复点击，给出「回答中」状态
6. 让模型看图说话
7. 拍照识物（DeepSeek 视觉模型）
视频教程
8. ...