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pandas: How do I split text in a column into multiple rows?
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+50
This spl...
How to catch integer(0)?
Let's say we have a statement that produces integer(0) , e.g.
6 Answers
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How are feature_importances in RandomForestClassifier determined?
...data used on the tree?
– Cokes
Jan 20 '15 at 20:27
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Two useful resources. (1) blog.datadive.net/...
How to generate random SHA1 hash to use as ID in node.js?
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edited May 23 '17 at 12:10
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answered Feb 23 '12 at 6:28
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What does (x ^ 0x1) != 0 mean?
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The XOR operation (x ^ 0x1) inverts bit 0. So the expression effectively means: if bit 0 of x is 0, or any other bit of x is 1, then the expression is true.
Conversely the expression is false if x == 1.
So the test is the same as:
if (x != 1)
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How can I obtain the element-wise logical NOT of a pandas Series?
...~s:
In [7]: s = pd.Series([True, True, False, True])
In [8]: ~s
Out[8]:
0 False
1 False
2 True
3 False
dtype: bool
Using Python2.7, NumPy 1.8.0, Pandas 0.13.1:
In [119]: s = pd.Series([True, True, False, True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, best of 3: 91.8 µs...
Why are elementwise additions much faster in separate loops than in a combined loop?
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How to drop a list of rows from Pandas dataframe?
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Use DataFrame.drop and pass it a Series of index labels:
In [65]: df
Out[65]:
one two...
Check substring exists in a string in C
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if(strstr(sent, word) != NULL) {
/* ... */
}
Note that strstr returns a pointer to the sta...
Deleting DataFrame row in Pandas based on column value
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