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How to group dataframe rows into list in pandas groupby?
... return df2
Tests:
In [301]: %timeit f(df)
1000 loops, best of 3: 1.64 ms per loop
In [302]: %timeit df.groupby('a')['b'].apply(list)
100 loops, best of 3: 5.26 ms per loop
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What is the fastest way to check if a class has a function defined?
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stevehasteveha
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Create instance of generic type whose constructor requires a parameter?
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shA.t
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answered Apr 8 '09 at 19:28
Jon SkeetJon Skeet
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Why is vertical-align: middle not working on my span or div?
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Samuel Liew♦
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answered May 18 '13 at 22:29
Charles Ad...
Action Image MVC3 Razor
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You can use Url.Content which works for all links as it translates the tilde ~ to the root uri....
How to print number with commas as thousands separators?
... In python 3.6 and up, f-strings add even more convenience. E.g. f"{2 ** 64 - 1:,}"
– CJ Gaconnet
Apr 19 '17 at 15:03
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numpy: most efficient frequency counts for unique values in an array
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>>> pd.value_counts(x)
1 5
2 3
25 1
5 1
dtype: int64
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Get current AUTO_INCREMENT value for any table
... answer. MySQL documentation (emphasis added): "LAST_INSERT_ID() returns a 64-bit value representing the first automatically generated value successfully inserted for an AUTO_INCREMENT column as a result of the most recently executed INSERT statement." Intuitive! dev.mysql.com/doc/refman/5.6/en/…
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How to convert an NSTimeInterval (seconds) into minutes
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%ld if you are in 64 bit machine.
– Anoop Vaidya
Jul 25 '13 at 14:25
5
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Delimiters in MySQL
...`localhost` PROCEDURE `get_count_for_department`(IN the_department VARCHAR(64), OUT the_count INT)
BEGIN
SELECT COUNT(*) INTO the_count FROM employees where department=the_department;
END$$
/*DELIMITER is set to it's default*/
DELIMITER ;
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