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Reading a huge .csv file
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what worked for me was and is superfast is
import pandas as pd
import dask.dataframe as dd
import time
t=time.clock()
df_train = dd.read_csv('../data/train.csv', usecols=[col1, col2])
df_train=df_train.compute()
print("load ...
How do I run a Python program in the Command Prompt in Windows 7?
... have the updated PATH. You can type set PATH at the command prompt to see what the current value is.
Exact steps for adding Python to the path on Windows 7+:
Computer -> System Properties (or Win+Break) -> Advanced System Settings
Click the Environment variables... button (in the Advance...
Check whether a string contains a substring
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Another possibility is to use regular expressions which is what Perl is famous for:
if ($mystring =~ /s1\.domain\.com/) {
print qq("$mystring" contains "s1.domain.com"\n);
}
The backslashes are needed because a . can match any character. You can get around this by using the \Q ...
What are the GCC default include directories?
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f4980819%2fwhat-are-the-gcc-default-include-directories%23new-answer', 'question_page');
}
);
Post as a guest
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Should I use int or Int32
...ph about aliases of simple types. So, from today perspective it is unclear what use is favored.
– SergICE
Aug 19 at 13:12
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Does name length impact performance in Redis?
...en less sensitive to this.
I think that having keys that clearly identify what values they hold greatly outweighs any minuscule speed performance you'd get out of abbreviated keys.
If you wanted to take this further, there's also a -r [keyspacelen] parameter on the redis-benchmark utility that let...
Clean way to launch the web browser from shell script?
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This may not apply exactly to what you want to do, but there is a really easy way to create and launch a server using the http-server npm package.
Once installed (just npm install http-server -g) you can put
http-server -o
in your bash script and it w...
Controlling a USB power supply (on/off) with Linux
...Whoa, thanks for that. I was thinking I had to go through libUSB no matter what. Any idea how to get the names of the attached devices as well?
– kamziro
Jan 15 '11 at 21:56
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Maximum on http header values?
Is there an accepted maximum allowed size for HTTP headers? If so, what is it? If not, is this something that's server specific or is the accepted standard to allow headers of any size?
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Assign pandas dataframe column dtypes
... I noticed convert_objects() has been deprecated... i'm not sure what replaced it?
– joefromct
Dec 18 '15 at 3:50
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