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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...t_index().drop_duplicates(subset='index', keep='first').set_index('index')
1000 loops, best of 3: 1.54 ms per loop
>>> %timeit df3.groupby(df3.index).first()
1000 loops, best of 3: 580 µs per loop
>>> %timeit df3[~df3.index.duplicated(keep='first')]
1000 loops, best of 3: 307 µ...
How can I find the method that called the current method?
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19 Answers
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ValueError: setting an array element with a sequence
...t isn't shaped like a multi-dimensional array. For example
numpy.array([[1,2], [2, 3, 4]])
or
numpy.array([[1,2], [2, [3, 4]]])
will yield this error message, because the shape of the input list isn't a (generalised) "box" that can be turned into a multidimensional array. So probably UnFilte...
How do you generate dynamic (parameterized) unit tests in python?
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179
This is called "parametrization".
There are several tools that support this approach. E.g.:
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MySQL: Set user variable from result of query
...but you need to move the variable assignment into the query:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES...
“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
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10 Answers
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Django select only rows with duplicate field values
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193
Try:
from django.db.models import Count
Literal.objects.values('name')
.annota...
Shell command to sum integers, one per line?
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Check substring exists in a string in C
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12 Answers
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