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Delete the first three rows of a dataframe in pandas
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281
Use iloc:
df = df.iloc[3:]
will give you a new df without the first three rows.
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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
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edited Dec 22 '14 at 22:36
answered Jan 19 '12 at 2:16
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What is considered a good response time for a dynamic, personalized web application? [closed]
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answered Oct 2 '08 at 20:01
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Is there a decorator to simply cache function return values?
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207
Starting from Python 3.2 there is a built-in decorator:
@functools.lru_cache(maxsize=100, typ...
How to redirect output of an entire shell script within the script itself?
... redirection...
{
#...part of script with redirection...
} > file1 2>file2 # ...and others as appropriate...
#...residue of script without redirection...
The braces '{ ... }' provide a unit of I/O redirection. The braces must appear where a command could appear - simplistically, at th...
How to use jQuery in chrome extension?
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128
You have to add your jquery script to your chrome-extension project and to the background secti...
Is there a list of screen resolutions for all Android based phones and tablets? [closed]
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Galaxy Y 320 x 240 ldpi 0.75 120 427 x 320 4:3 1.3333 427 x 320
? 400 x 240 ldpi 0.75 120 533 x 320 5:3 1.6667 ...
Check Whether a User Exists
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295
You can also check user by id command.
id -u name gives you the id of that user.
if the user d...
How to add a delay for a 2 or 3 seconds [closed]
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You could use Thread.Sleep() function, e.g.
int milliseconds = 2000;
Thread.Sleep(milliseconds);
that completely stops the execution of the current thread for 2 seconds.
Probably the most appropriate scenario for Thread.Sleep is when you want to delay the operations in another thread,...
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