Popular recipes tagged "pipe" but not "map"

Functional D plus Python pipeline to generate PDF (Text)

2016-09-22T15:32:17-07:00

Text recipe 580701 by Vasudev Ram (pdfwriter, pdf_generation, pipe, pipeline, xtopdf).

This recipe is a command pipeline. The first component of the pipeline is a D language program that makes use of simple functional programming and template / generic programming features of D, to transform some input into the desired output. Both input and output are text. The D program writes the output to standard output, which is then read by a Python program that reads that as input via standard input, and converts it to PDF.

Python-controlled Unix pipeline to generate PDF (Python)

2016-01-07T18:02:52-08:00

Python recipe 579146 by Vasudev Ram (linux, pdf, pdf_generation, pipe, pipelining, python, python2, unix).

This recipe shows how to create a Unix pipeline that generates PDF output, under the control of a Python program. It is tested on Linux. It uses nl, a standard Linux command that adds line numbers to its input, and selpg, a custom Linux command-line utility, that selects only specified pages from its input, together in a pipeline (nl | selpg). The Python program sets up and starts that pipeline running, and then reads input from it and generates PDF output.

Threaded communication with subprocess (Python)

2013-03-13T06:06:16-07:00

Python recipe 578488 by Jan Müller (async, ipc, messaging, multithreading, pipe, queue, subprocess). Revision 3.

This recipe shows how to domesticate another executable as a service in a subprocess.

rdd (mostly broken but shows how to do a few things in ruby) (Ruby)

2014-07-12T16:58:06-07:00

Ruby recipe 578034 by Mike 'Fuzzy' Partin (dd, ftp, io, net_ftp, pipe, pipelining, popen, subprocess). Revision 3.

Meant to be a slightly more "advanced" dd utility. Supporting FTP/File/STDIN as input streams, and File/STDOUT/PIPE as output targets, and sporting a progress display (very rudimentary atm), add lets you combine network, and file or pipe processing in a single command. But kind of ended up a mess, see the Python version which is pretty clean.

Pyliner - Script to run arbitrary Python code on the command line (Python)

2011-07-29T13:22:54-07:00

Python recipe 577075 by Drew Gulino (awk, oneliner, perl, pipe, python, sed, sysadmin).

A Python script that runs arbitrary Python scripts in an input loop. This allows one-liner Python scripts similarly to how Perl runs them (-l,-a,-n,-F, BEGIN, END)

It provides additional syntax that allows multiline Python scripts to be run on a single line

Align text filter (Python)

2010-03-09T07:34:43-08:00

Python recipe 577093 by Denis Barmenkov (align, pipe, text, wrap). Revision 4.

Python 2.3 module textwrap can justify text in three modes: left/right/center. Sometimes 'align' mode become more useful.

Asynchronous pipe communication using asyncore (Python)

2013-10-29T16:48:22-07:00

Python recipe 576967 by Glenn Eychaner (async, asyncore, i_o, pipe). Revision 9.

Extends file_dispatcher to provide extra functionality for reading from and writing to pipes. Uses the observer pattern (recipe 576962) to provide notification of new data and closed pipes.

Subprocess with async I/O pipes class (Python)

2009-05-17T02:02:04-07:00

Python recipe 576759 by Mike Kazantsev (asynchronous, ipc, non_blocking_i_o, pipe, subprocess). Revision 2.

Just stumbled upon the need to move data chunks between subprocesses in a non-linear way with some logic in-between, so tee(1) and fifo(7)'s weren't too good option. Inspired by 440554, but rewritten from scratch to remove unnecessary delays due to sleep(3) calls and suboptimal try/sleep-based polling.

commanding via a duplex pipe stream. (C)

2009-06-07T01:41:19-07:00

C recipe 576773 by J Y (command, ipc, pipe). Revision 2.

commanding via a duplex pipe stream.

CallPipe: Call the methods of an object in a remote process (Python)

2008-09-17T17:33:36-07:00

Python recipe 576509 by david decotigny (call, multiprocessing, pipe, processing, remote). Revision 6.

I am process A and I own object Obj. Now I decide to fork(): process B is born.

How do I do to make process B call the methods of A's object Obj (and not the methods of its own copy of Obj...) ?

This is what this module does: you create the "CallPipe" for Obj prior to fork()ing, and then process B can call any method of A's object Obj through it.