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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
...drop_duplicates(subset='A', keep="last")
Out[10]:
A B
1 1 20
3 2 40
4 3 10
You can do also something like:
In [12]: df.groupby('A', group_keys=False).apply(lambda x: x.loc[x.B.idxmax()])
Out[12]:
A B
A
1 1 20
2 2 40
3 3 10
...
What's the point of g++ -Wreorder?
...
answered Dec 1 '09 at 18:40
int3int3
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...
range() for floats
...nyways :)
– Jonathan
Sep 1 '11 at 7:40
3
>>> print list(frange(0,100,0.1))[-1]==100.0 wi...
How to sort a NSArray alphabetically?
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webo80
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answered Aug 29 '09 at 11:21
Thomas ZoechlingTho...
When does ADT set BuildConfig.DEBUG to false?
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40
With Eclipse, I always disable "Build Automatically" option before Exporting the app in release...
What is the purpose of Looper and how to use it?
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401
What is Looper?
Looper is a class which is used to execute the Messages(Runnables) in a queue...
What's the optimum way of storing an NSDate in NSUserDefaults?
...e record - 32 bit floats have only 24 bits for accuracy, so 1970 to now is 40 years, which is 40*365*86400 seconds, and (40 * 365 * 86 400) / (2 ** 24) = 75second error. Double precision is what a DateTime interval, and its RAW precision is now better than a millionth of a second.
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Is there a way to iterate over a range of integers?
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Paul HankinPaul Hankin
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How to create a drop shadow only on one side of an element?
...ground-color: #3D668F;
height: 8px;
width: 80px;
margin-left: -40px;
position: absolute;
bottom: 0px;
left: 50%;
z-index: 5;
-webkit-box-shadow: 0px 2px 4px #000000;
-moz-box-shadow: 0px 2px 4px #000000;
box-shadow: 0px 2px 4px #000000;
}
Original...
VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术
...指定了无效区域矩形的对角顶点（如果开始有一个((0,0),(40,40))，现在又来一个((20,20),(60,30))，那么拼接后就是((0,0),(60,40))），fErase字段如果为非零值，表示Windows在发送WM_PAINT消息前已经使用背景色擦除了无效区域，后面3个字段是...