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Pandas dataframe get first row of each group
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>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 seco...
Android Gradle plugin 0.7.0: “duplicate files during packaging of APK”
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As of Android Studio version 0.8.14
You should add:
android {
packagingOptions {
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
exclude '...'
}
}
to your build.gradle file.
History:
According to c...
Return index of greatest value in an array
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12 Answers
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Is SQL or even TSQL Turing Complete?
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edited Nov 11 '13 at 4:45
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how does array[100] = {0} set the entire array to 0?
How does the compiler fill values in char array[100] = {0}; ? What's the magic behind it?
4 Answers
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...utable? Or is this just a common convention and not guaranteed to be true 100% of the time?
8 Answers
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Removing white space around a saved image in matplotlib
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13 Answers
13
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Easy pretty printing of floats in python?
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18 Answers
18
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How do I catch a numpy warning like it's an exception (not just for testing)?
... for numpy.seterr:
>>> import numpy as np
>>> np.array([1])/0 #'warn' mode
__main__:1: RuntimeWarning: divide by zero encountered in divide
array([0])
>>> np.seterr(all='print')
{'over': 'warn', 'divide': 'warn', 'invalid': 'warn', 'under': 'ignore'}
>>> np.arr...