Commands using python sorted by votes

Commands using python (80)

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Using scapy to get the IP of the iface used to contact local gw (i.e. supposed host IP)

You need python-scapy package Show Sample Output
This is sample output - yours may be different.
```
201.201.2.3
```
1

python -c "import scapy.all; print [x[4] for x in scapy.all.conf.route.routes if x[2] != '0.0.0.0'][0]"

prayer · 2009-05-21 19:33:55 4
Pretty Print a simple csv in the command line

Will handle pretty much all types of CSV Files. The ^M character is typed on the command line using Ctrl-V Ctrl-M and can be replaced with any character that does not appear inside the CSV. Tips for simpler CSV files: * If newlines are not placed within a csv cell then you can replace `map(repr, r)` with r Show Sample Output
This is sample output - yours may be different.
```
'Date'        'info'    'name'              'amount'
'3/4/2009'    'abc123'  'Momo, Chika'       '1,000.00'
'9/14/2008'   'abc123'  'Kilo, Bamya'       '500'
'2/21/2009'   'abc123'  'Abeer, Bilhaj'     '10,000'
'5/9/2008'    'abc123'  'Adel, Ayoob'       '100'
'10/10/2008'  'abc123'  'Merabet, Jinkins'  ''
'10/13/2008'  'abc123'  'tito, micheal'     '50'
```
1

python -c 'import sys,csv; c = csv.reader(sys.stdin); [sys.stdout.write("^M".join(map(repr,r))+"\n") for r in c];' <tmp/test.csv | column -s '^M' -t

pykler · 2010-02-01 14:57:25 8
Easily decode unix-time (funtion)
This is sample output - yours may be different.
1

utime(){ python -c "import time; print(time.strftime('%a %b %d %H:%M:%S %Y', time.localtime($1)))"; }

4Aiur · 2010-05-14 08:00:44 4
Command line calculator

This function defines a command line calculator that handles everything pythons math module can handle, e.g. trigonometric functions, sqrt, log, erf, ... (see http://docs.python.org/library/math.html). It even knows about the constants pi and e. Show Sample Output
This is sample output - yours may be different.
```
> calc "sin(pi/3.0)**2"
0.75
> calc "log(e)"
1.0
```
1

calc() { python -c "from math import *; print $1"; }

asmaier · 2010-10-07 08:26:39 7
Generate random valid mac addresses

Python Alternative Show Sample Output
This is sample output - yours may be different.
```
2a:27:2a:1d:22:0a
37:3d:c9:c8:09:97
...
```
1

python -c "from itertools import imap; from random import randint; print ':'.join(['%02x'%x for x in imap(lambda x:randint(0,255), range(6))])"

ohe · 2010-12-08 11:02:16 6
Generate a ZenCart-style MD5 password hash.

ZenCart uses a MD5 with a salt to secure its passwords. If you need to forcibly change someone's password to a known value within the database, this one-liner can generate the password. Change the value of 'p' to the password you want. Show Sample Output
This is sample output - yours may be different.
```
fcb35a57bb4a6a17063fab56fad93138:23
```
1

python -c 'p="SeCuR3PwD";import hashlib as h;s=h.md5(p).hexdigest()[:2];pw=h.md5(s+p).hexdigest();print pw+":"+s;'

Xiol · 2011-10-16 18:49:08 5
Command line calculator

This opens a python command line. You can use math and random and float-division is enabled (without appending .0 to integers). I just don't know how to specify a standard precision.
This is sample output - yours may be different.
1

python -ic "from __future__ import division; from math import *; from random import *"

fpunktk · 2011-10-24 19:47:27 6
Generate a 18 character password, print the password and sha512 salted hash

Generate a 18 character password from character set a-zA-Z0-9 from /dev/urandom, pipe the output to Python which prints the password on standard out and in crypt sha512 form. Show Sample Output
This is sample output - yours may be different.
```
NH6wAL58sKSkqBNUwK
$6$6ZpaL7bakRyXzrpM$TVS4d217.BDjKLEnYkPBtpR8CwXes5HI6U2pcSEoB3x9xUbXVxacEhvlvKFCi4tftwxOJs.Comh7u.GiPvA6X1
```
1

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 18 | head -1 | python -c "import sys,crypt; stdin=sys.stdin.readline().rstrip('\n'); print stdin;print crypt.crypt(stdin)"

cnyg · 2012-11-09 00:40:22 5
List all available python modules
This is sample output - yours may be different.
1

python -c "help('modules')"

zlemini · 2013-01-13 15:10:23 5
sort a JSON blob

For situations where you keep JSON in a VCS and you want your diffs to be sane, such as within a Chef configuration repo.
This is sample output - yours may be different.
1

cat foo.json | python -mjson.tool

jeffgage · 2013-05-06 20:11:05 1489
Pretty print SQL query with python in one line

You need to apt-get install python-sqlparse. This command simply formats a sql query and prints it out. It is very useful when you want to move a sql query from commandline to a shell script. Everything is done locally, so you don't need to worry about copying sql query to external websites. Show Sample Output
This is sample output - yours may be different.
```
SELECT a,
       b,
       c
FROM TABLE
WHERE a = 3;
```
1

echo "select a, b, c from table where a = 3;"| python -c "import sys;import sqlparse;print sqlparse.format(sys.stdin.read(), reindent=True, keyword_case='upper')"

hide1713 · 2014-02-21 23:17:15 9
Upgrade pip-installed python packages
This is sample output - yours may be different.
1

python -c "import pip; print(' '.join([x.project_name for x in pip.get_installed_distributions()]))" | xargs sudo pip install -U

wires · 2014-11-16 09:59:24 8
Convert JSON to YAML (unicode safe)

If you tried the other Python version of Convert JSON to YAML and you end up with lines that has "!!python/unicode", this version of the command is for you.
This is sample output - yours may be different.
1

python -c 'import sys, yaml, json; yaml.safe_dump(json.load(sys.stdin), sys.stdout, allow_unicode=True)' < foo.json > foo.yaml

renoirb · 2015-01-20 15:58:29 7
Ergo browsing 'pacman' queries (Arch)

Alternative1 (grep support): pacman -Ss python | paste - - | grep --color=always -e '/python' | less -R Alternative2 (eye-candy, no grep): pacman --color=always -Ss "python" | paste - - | less -R in ~/.bashrc: pkg-grep() { pacman -Ss "$1" | paste - - | grep --color=always -e "${2:-$1}" | less -R ; } pkg-search() { pacman --color=always -Ss "python" | paste - - | less -R; } Show Sample Output
This is sample output - yours may be different.
```
extra/python 3.5.1-1 [installed]            Next generation of the python high-level scripting language
extra/python-astroid 1.4.4-1        Useful miscellaneous modules used by Logilab projects
extra/python-atspi 2.18.0-1 [installed]     Python 3 bindings for at-spi
extra/python-beaker 1.7.0-3         Caching and sessions WSGI middleware for use with web applications and stand-alone Python scripts and applications
...
```
1

pacman -Ss python | paste - - | grep --color=always -e '/python' | less -R

hute37 · 2016-01-25 14:29:31 13

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously Show Sample Output

strace python -m trace --trace myprog.py | grep -v 'write(1,'

roolebo · 2016-05-27 21:01:01 70

Convert CSV to JSON - Python3 and Bash function

Based / Inspired by malathion's below command http://www.commandlinefu.com/commands/view/20528/convert-csv-to-json Is written for python3 and is very easy to use csv2json *csv will convert all files ending in csv to json eg csv2json file.csv will output a file to file.json Validity of json tested in python3 and below site https://jsonformatter.curiousconcept.com/
This is sample output - yours may be different.
1

csv2json() { for file in $@; do python -c "import csv,json,fileinput; print(json.dumps(list(csv.reader(fileinput.input()))))" "$file" 1> "${file%%csv}json"; done; }

snipertyler · 2017-06-28 04:28:32 16
Python extract json
This is sample output - yours may be different.
1

echo "[{"Name": "bar"}]" | python -c 'import json,sys;obj=json.load(sys.stdin);print(obj[0]["Name"]);')

moerin · 2018-03-31 21:31:53 230
Share the current tree over the web

Want to show something on your machine to someone over the web? Don't copy it or upload it somewhere. Just run "webshare" and the current directory and everything beneath it will be served from a new web server listening on port 8000. When your pal is finished, hit control-c. Found at www.shell-fu.org/lister.php?id=54
This is sample output - yours may be different.
0

python -c "import SimpleHTTPServer;SimpleHTTPServer.test()"

anokneemouse · 2009-02-05 15:43:43 53
search into contents of python module

srchpymod for e.g. srchpymod cairo Surface ['ImageSurface', 'PDFSurface', 'PSSurface', 'SVGSurface', 'Surface', 'SurfacePattern', 'XlibSurface'] Show Sample Output
This is sample output - yours may be different.
```
Matched symbols in the python module.
```
0

srchpymod() { python -c "import $1; print filter(lambda x: x.find('$2') >= 0, dir($1))"; };

jyro · 2009-02-16 02:47:13 62
Test python regular expressions

One can test their python regex matching using this shell function. for e.g. rgx_match "translate\s*$([0-9-.]+),([0-9-.]+)$" "translate(162.11517,76.817357)" ('162.11517', '76.817357')
This is sample output - yours may be different.
0

rgx_match() { python -c "import re; print re.search('$1','$2').groups()"; }

jyro · 2009-02-16 04:07:54 62
Get number of diggs for a news URL
This is sample output - yours may be different.
0

curl -s "http://services.digg.com/stories?link=$NEWSURL&appkey=http://www.whatever.com&type=json" | python -m simplejson.tool | grep diggs

jyro · 2009-08-24 08:49:20 4
When need to compress the Zope Database

When need to pack the ZODB...
This is sample output - yours may be different.
0

python fsrecovery.py -P 0 -f <path-to-instance>/Data.fs <path-to-instance-destination>/Data.fs.packed

0disse0 · 2009-09-10 19:55:41 3

configify the list of gems on ur machine. the quick hack

Just a small hack for ruby's environment.rb Show Sample Output

gem list --local | python -c "import sys;import re;l=sys.stdin.readlines();x=['config.gem :'+line[:-1][:line.index(' ')] + ' , ' +line[:-1][line.index(' '):].replace('(',':version => ').replace(')','') for line in l];print '\n'.join(x)"

packetloss · 2009-11-25 09:04:29 6

configify the list of gems on ur machine. the quick hack

put quotes
This is sample output - yours may be different.
0

gem list --local | python -c "import sys;import re;l=sys.stdin.readlines();x=['config.gem \"'+line[:-1][:line.index(' ')] + '\" , ' +line[:-1][line.index(' '):].replace('(',':version => \"').replace(')','')+'\"' for line in l];print '\n'.join(x)"

packetloss · 2009-11-25 09:21:20 6
Print a row of 50 hyphens
This is sample output - yours may be different.
0

python -c 'print "-" * 50'

4Aiur · 2010-01-07 13:11:44 5
< 1 2 3 4 >

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Never rewrites a file while copying (or moving)

Allows you to preserve your files when using cp, mv, ln, install or patch. When the target file exists, it will generate a file named XXX.~N~ (N is an auto-incremental number) instead of deleting the target file.

View all images

So you are in directory with loads of pictures laying around and you need to quickly scan through them all

Another Curl your IP command

Just another curl command to get your public facing IP

Kills a process that is locking a file.

Useful when you're trying to unmount a volume and other sticky situations where a rogue process is annoying the hell out of you.

Buffer in order to avoir mistakes with redirections that empty your files

A common mistake in Bash is to write command-line where there's command a reading a file and whose result is redirected to that file. It can be easily avoided because of : 1) warnings "-bash: file.txt: cannot overwrite existing file" 2) options (often "-i") that let the command directly modify the file but I like to have that small function that does the trick by waiting for the first command to end before trying to write into the file. Lots of things could probably done in a better way, if you know one...

Unlock your KDE4 session remotely (for boxes locked by KDE lock utility)

Do the unlock KDE screen saver locked session with lightdm display manager used in Kubuntu 12.10 +

Quickly build ulimit command from current values

It is helpful to know the current limits placed on your account, and using this shortcut is a quick way to figuring out which values to change for optimization or security. Alias is: $ alias ulimith="command ulimit -a|sed 's/^.*$[a-z]$)$.*$$/-\1\2/;s/^/ulimit /'|tr '\n' ' ';echo" Here's the result of this command: $ ulimit -c 0 -d unlimited -e 0 -f unlimited -i 155648 -l 32 -m unlimited -n 8192 -p 8 -q 819200 -r 0 -s 10240 -t unlimited -u unlimited -v unlimited -x unlimited $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 155648 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) unlimited virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

RTFM function

Some commands have more information on 'info' than in the man pages

convert hex to decimal ; decimal to hex

Losslessly rotate videos from your phone by 90 degrees.

Takes all the .3gp files in the directory, rotates them by 90 degrees, and saves them in the lossless ffv1 encoding. If this rotates in the wrong direction, you may want transponse=1 Re-encoding to ffv1 may result in a significant increase in file size, as it is a lossless format. Other applications may not recognize ffv1 if they don't use ffmpeg code. "huffyuv" might be another option for lossless saving of your transformations. The audio may be re-encoded as well, if the encoding used by your 3gp file doesn't work in a avi container.

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Commands using python (80)

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