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Pyped 1.1.2

Command that pipes data from bash to Python, and vice-versa

Latest Version: 1.4

Pyped: command that pipes data from bash to Python, and vice-versa
=================================================================

*WARNING: since the last version the command line name "py" has been
renamed to "pyp" to avoid conflict with the new tool in the Python
stdlib named "py". It means pyped is now incompatible with the
"Python Power at the Prompt" project sharing the same name and goals.*

Pyped is a command-line tool that let you process another command
output with a Python one-liner like Perl or AWK.

Ever wish you could do this::

$ ps aux | pyp "line = x.split()" "print(line[1], line[-1])" | grep worker
18921 [kworker/1:2]
22489 [kworker/3:0]
24065 [kworker/3:3]
24869 [kworker/u:3]
25463 [kworker/u:1]
25511 [kworker/2:2]
25720 [kworker/0:2]
26343 [kworker/0:1]
26491 [kworker/2:0]
26569 [kworker/1:0]
26592 [kworker/u:0]
26861 worker

Or this::

$ ls -1 | pyp -i "for x in Counter(path(x.split()[-1]).ext for x in l).items(): print(x)"
(u'.sh', 2)
('', 3)
(u'.sh~', 3)
(u'.py', 4)
(u'.desktop', 1)


Pyped make that possible by giving you the `py` commande.

How to install ?
=================

Just type::

pip install pyped

Please note this is beta code, it will void your waranty, you may take weight,
loose your job and your wife and endorse unspeakable believes.

How to use ?
=============

Usage::

shell_command | pyp [options] "any python one-liner" [another python one-liner] [| another_shell_function]

Your python code will have access to the variable `x`, which will be a line from
stdin converted to unicode (with no ending '\n'). Each line from stdin
will be stuffed to `x` one by one, and your python code
will be executed for each new value for `x`

You'll also have access to the variable `i`, an integer incremented at each
call of you Python expression, starting from 0.

Your code MUST print something, if you wish something to appear.

Without Pyped::

$ ls /etc | tail
wordpress
wpa_supplicant
X11
xdg
xml
xul-ext
xulrunner-1.9.2
y-ppa-manager.conf
zsh
zsh_command_not_found

With Pyped::

$ ls /etc/ | tail | pyp "print('%s %s' % (i, x.upper()))"
0 WORDPRESS
1 WPA_SUPPLICANT
2 X11
3 XDG
4 XML
5 XUL-EXT
6 XULRUNNER-1.9.2
7 Y-PPA-MANAGER.CONF
8 ZSH
9 ZSH_COMMAND_NOT_FOUND

You can even make very long one time scripts::

$ ps aux | pyp "
if i > 0:
values = x.split()
user, pid = values[:2]
command = ' '.join(values[10:])
if user != 'root':
print('\"%s\";\"%s\";\"%s\"' % (user.upper(), pid, command))
"
"SYSLOG";"741";"rsyslogd -c5"
"AVAHI";"788";"avahi-daemon: running"
"AVAHI";"791";"avahi-daemon: chroot helper"
"DAEMON";"1271";"atd"
"WHOOPSIE";"1289";"whoopsie"
"MYSQL";"1304";"/usr/sbin/mysqld"
"KEVIN";"1699";"ps aux"
"KEVIN";"2167";"-"
"TIMIDITY";"2202";"/usr/bin/timidity -Os -iAD"
"RTKIT";"2594";"/usr/lib/rtkit/rtkit-daemon"
"KEVIN";"2763";"/usr/bin/gnome-keyring-daemon --daemonize --login"
"KEVIN";"2774";"gnome-session --session=ubuntu"



Options
=======

-i
***

If you pass `-i`, then `x` will not exists, but `l` will contain
an iterable for which each call to `next()` return a line of stdin,
converted to unicode.

It is mainly used for processing you wish to apply to the whole stdin such as joining or for global counters.

E.G::

$ ls /etc/ | tail | pyp -i "print('-'.join(i.strip() for i in l))"
wordpress-wpa_supplicant-X11-xdg-xml-xul-ext-xulrunner-1.9.2-y-ppa-manager.conf-zsh-zsh_command_not_found

-b
***

Pass an expression you wish to run BEFORE reading from stdin.
Mainly used for imports.

E.G::

$ ls /etc/ | tail | pyp "print(pickle.dumps(x))" -b "import pickle"
Vwordpress
p0
.
Vwpa_supplicant
p0
.
VX11

This is executed only once.

-a
***

Pass an expression you wish to run AFTER reading all stdin.

Is is executed in a finally clause, so it runs even if your code fails before.

Mainly used for counters and cleanup.

E.G::

$ ls /etc/ | tail | pyp "x" -a 'print i'
wordpress
wpa_supplicant
X11
xdg
xml
xul-ext
xulrunner-1.9.2
y-ppa-manager.conf
zsh
zsh_command_not_found
9

This is executed only one.


--stdin-charset
*****************

Force the charset to decode input. Otherwise, we try to
detect it, and fallback on UTF-8 if it fails.

E.G::

$ ls /etc/ | tail | pyp "x.split('-')[0]" --stdin-charset ascii
wordpress
wpa_supplicant
X11
xdg
xml
xul
xulrunner
y
zsh
zsh_command_not_found

Be careful, that could fail miserably if you choose a bad charset:

$ ls /etc/ | tail | pyp "é" --stdin-charset ascii
'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in range(128)

--rstrip=no
************

Each line from stdin has .rstrip('\n') applied to it before being
passed to your code so you can call `print()` without thinking about it.

However, if you do wish to keep the line breaks, use --rstrip=no.

The usual result::

$ ls /etc/ | pyp -i "for x in list(l)[:5]: print(x)"
total 2,5M
drwxr-xr-x 204 root root 12K déc. 1 16:40 .
drwxr-xr-x 26 root root 4,0K nov. 12 07:37 ..
drwxr-xr-x 3 root root 4,0K mars 7 2013 acpi
-rw-r--r-- 1 root root 3,0K avril 26 2011 adduser.conf

The result if you supress right stripping::

$ ls /etc/ | pyp -i "for x in list(l)[:5]: print(x)" --rstrip=no
total 2,5M

drwxr-xr-x 204 root root 12K déc. 1 16:40 .

drwxr-xr-x 26 root root 4,0K nov. 12 07:37 ..

drwxr-xr-x 3 root root 4,0K mars 7 2013 acpi

-rw-r--r-- 1 root root 3,0K avril 26 2011 adduser.conf


Imports
==========

Before doing any processing, we import several modules so they are
immediatly available in your Python code::

import sys
import os
import re
import json
import base64
import calendar
import csv
import itertools
import random
import hashlib
import tempfile
import argparse
import random
import math

from itertools import *
from uuid import uuid4
from datetime import datetime, timedelta
from collections import Counter, OrderedDict

We also import these 4 third party libraries::

import arrow # better datetime
import requests # better http request

from minibelt import * # better itertools
from path import path # better path handling

They should have been installed by setuptools automatically, so if you use pip or
easy_install, you are good to go.

If you didn't, and you don't have them installed, these imports will be ignored.

While Pyped is based on Python 2.7, it also imports some backported features
from Python 3::

from __future__ import (unicode_literals, absolute_import,
print_function, division)

This means `print` is a function, any string is unicode by default and does
not need to be prefixed by `u`, division doesn't truncate and
imports are absolute (but you can use the relative import syntax).  
File Type Py Version Uploaded on Size
Pyped-1.1.2.tar.gz (md5) Source 2014-03-19 15KB
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