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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
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I would suggest using the duplicated method on the Pandas Index itself:
df3 = df3[~df3.index.duplicated(keep='first')]
While all the other methods work, the currently accepted answer is by far the least performant for the provided example. Furthermore, while the groupby method is only slightly les...
Check if value exists in Postgres array
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337
Simpler with the ANY construct:
SELECT value_variable = ANY ('{1,2,3}'::int[])
The right op...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
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135
The file is being read as a bunch of strs, but it should be unicodes. Python tries to implicitl...
Multiple levels of 'collection.defaultdict' in Python
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347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This wil...
Check if a JavaScript string is a URL
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32 Answers
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Can anybody push to my project on github?
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3 Answers
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Is it possible to use JS to open an HTML select to show its option list? [duplicate]
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edited Jul 10 '18 at 10:31
answered Jan 10 '09 at 0:20
Ga...
How to overwrite the previous print to stdout in python?
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123
One way is to use the carriage return ('\r') character to return to the start of the line withou...
Change from SQLite to PostgreSQL in a fresh Rails project
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13 Answers
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