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SQLite: How do I save the result of a query as a CSV file?
...matically.
import pandas as pd
import sqlite3
conn = sqlite3.connect('your_cool_database.sqlite')
df = pd.read_sql('SELECT * from orders', conn)
df.to_csv('orders.csv', index = False)
You can customize the query to only export part of the sqlite table to the CSV file.
You can also run a single co...
How to play a local video with Swift?
...uca Angeletti
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Regular expression to search for Gadaffi
...bucks.
– Incognito
Mar 21 '11 at 18:32
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Stripping everything but alphanumeric chars from a string in Python
...ng.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
"import string" \
"''.join(ch for ch in string.printable if ch.isalnum())"
10000 loops, best of 3: 57.6 usec per loop
$ python -m tim...
Mean per group in a data.frame [duplicate]
... 22 87
Cat 2 67 43
Cat 3 45 32', header=TRUE)
aggregate(d[, 3:4], list(d$Name), mean)
Group.1 Rate1 Rate2
1 Aira 16.33333 47.00000
2 Ben 31.33333 50.33333
3 Cat 44.66667 54.00000
Here we aggregate columns 3 and 4 of data.frame d, ...
Update relationships when saving changes of EF4 POCO objects
...c0y0teXc0y0teX
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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...r" ].
– AllenHalsey
Oct 6 '10 at 20:32
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
... Scala
– sscarduzio
Nov 3 '17 at 17:32
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Two lambda's like that is pretty ugly. I think if/else ...
How to delete a file from SD card?
...id 4.4+. But the same code working for 4.3/
– hasnain_ahmad
Jul 18 '16 at 12:31
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Calculate the median of a billion numbers
...i I don't think it would take too long; a billion numbers is only 4 GB for 32-bit ints/floats, 8GB for 64-bit ints/doubles. Neither seems tremendously taxing.
– DrPizza
Aug 3 '15 at 6:01
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