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Reading a huge .csv file
I'm currently trying to read data from .csv files in Python 2.7 with up to 1 million rows, and 200 columns (files range from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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What is the difference between NaN and None?
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edited Nov 22 '17 at 18:10
JiminyCricket
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Determining type of an object in ruby
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626
The proper way to determine the "type" of an object, which is a wobbly term in the Ruby world, ...
Increment a database field by 1
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292
Updating an entry:
A simple increment should do the trick.
UPDATE mytable
SET logins = lo...
Read binary file as string in Ruby
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edited Jul 10 '12 at 7:57
Rory O'Kane
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Get a random boolean in python?
...eit -s "import random" "random.getrandbits(1)"
1000000 loops, best of 3: 0.286 usec per loop
$ python -m timeit -s "import random" "bool(random.getrandbits(1))"
1000000 loops, best of 3: 0.441 usec per loop
$ python -m timeit -s "import random" "not random.getrandbits(1)"
1000000 loops, best of 3: 0...
Removing pip's cache?
I need to install psycopg2 v2.4.1 specifically. I accidentally did:
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Apache shows PHP code instead of executing it
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MVC 4 Razor File Upload
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edited Jan 22 '14 at 17:31
answered Mar 28 '13 at 11:38
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Really Cheap Command-Line Option Parsing in Ruby
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