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How do you calculate program run time in python? [duplicate]
...cript, you can run it under time on a unix-like system.
kotai:~ chmullig$ cat sleep.py
import time
print "presleep"
time.sleep(10)
print "post sleep"
kotai:~ chmullig$ python sleep.py
presleep
post sleep
kotai:~ chmullig$ time python sleep.py
presleep
post sleep
real 0m10.035s
user 0m0.0...
python .replace() regex [duplicate]
...ub(regex_search,regex_replace,contents)
– Walrus the Cat
Feb 2 '15 at 18:54
4
...
Is there a way to “limit” the result with ELOQUENT ORM of Laravel?
...
Also, we can use it following ways
To get only first
$cat_details = DB::table('an_category')->where('slug', 'people')->first();
To get by limit and offset
$top_articles = DB::table('an_pages')->where('status',1)->limit(30)->offset(0)->orderBy('id', 'DESC')->...
Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...
...ux发行版本。
漏洞检测方法
请自行检测：
[[test]] $ cat > GHOST.c << EOF #include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #define CANARY"in_the_coal_mine" struct { char buffer[1024]; char canary[sizeof(CANARY)]; } temp = { "buffe...
Which version of CodeIgniter am I currently using?
...
In newer versions CodeIgniter.php is located in /system/core folder.
– z-boss
Jul 14 '11 at 3:08
...
count the frequency that a value occurs in a dataframe column
...oupby.html
Also value_counts() as @DSM has commented, many ways to skin a cat here
In [38]:
df['a'].value_counts()
Out[38]:
b 3
a 2
s 2
dtype: int64
If you wanted to add frequency back to the original dataframe use transform to return an aligned index:
In [41]:
df['freq'] = df.groupb...
How to import multiple .csv files at once?
...nto one file.
In Unix, if the files had no headers, then its as easy as:
cat *.csv > all.csv
or if there are headers, and you can find a string that matches headers and only headers (ie suppose header lines all start with "Age"), you'd do:
cat *.csv | grep -v ^Age > all.csv
I think in W...
Remove file extension from a file name string
...
Watch out for files with no extension, like foo/bar.cat/cheese!
– Cameron
Jan 24 '14 at 14:54
S...
How to modify a global variable within a function in bash?
...then add a variable? You definitively do not want to alter all the 1000 locations where a call to d is involved.
So leave the x away, so we can write:
_passback() { while [ 0 -lt $# ]; do printf '%q=%q;' "$1" "${!1}"; shift; done; }
d() { let x++; output=$(date +%Y%m%d-%H%M%S); _passback output ...
How to fix apt-get: command not found on AWS EC2? [closed]
...pt-get doesn't work? type yum instead.
– Walrus the Cat
Nov 30 '16 at 22:29
Hey @Pat841 , mark this as the answer
...