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Re: Bash-like pipes in Python

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Sivan Greenberg <sivan@vitakka.co>:

> If I understand correctly, the binary right or overloading that's seen
> here can be applied to any other computational objects.
>
> I could also think of implementing it for input / output pipes
> overloading the __ror__ method with .communicate() method of the Popen
> object [0].

I'm thinking it's all of the above and more!

At the bottom is the generic pipelining of generators.

Then there's the special case of integrating external commands with the
generic framework:

    cmd('cat /etc/passwd', stdin=None) | List

(Is "stdin=None" needed?)

Then there's the enriching of data formats. The line-based delineation
is old-school and unsafe, and should be considered for legacy only. The
internal data format is arbitrary Python object sequences, but
externally, JSON should be preferred. Thus, we'll need converters
from/to JSON.

What is still missing is the true generator lambdas:

    produce_data | (
        lambda name, value:
            yield value) | \
        consume_values

as in bash:

    produce_data |
    while read name value; do
        echo $value
    done |
    consume_values


Marko

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Thread

Bash-like pipes in Python Steven D'Aprano <steve@pearwood.info> - 2016-03-17 01:57 +1100
  Re: Bash-like pipes in Python Joel Goldstick <joel.goldstick@gmail.com> - 2016-03-16 11:09 -0400
    Re: Bash-like pipes in Python Christian Gollwitzer <auriocus@gmx.de> - 2016-03-16 16:16 +0100
  Re: Bash-like pipes in Python Random832 <random832@fastmail.com> - 2016-03-16 11:20 -0400
    Re: Bash-like pipes in Python Steven D'Aprano <steve@pearwood.info> - 2016-03-17 21:58 +1100
      Re: Bash-like pipes in Python Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 13:49 +0200
        Re: Bash-like pipes in Python Sivan Greenberg <sivan@vitakka.co> - 2016-03-17 14:10 +0200
          Re: Bash-like pipes in Python Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 14:44 +0200
  Re: Bash-like pipes in Python "Sven R. Kunze" <srkunze@mail.de> - 2016-03-16 16:20 +0100
  Re: Bash-like pipes in Python Random832 <random832@fastmail.com> - 2016-03-16 11:21 -0400
  Re: Bash-like pipes in Python Steven D'Aprano <steve@pearwood.info> - 2016-03-17 02:39 +1100
  Re: Bash-like pipes in Python Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 19:04 +0200
    Re: Bash-like pipes in Python Steven D'Aprano <steve@pearwood.info> - 2016-03-18 01:10 +1100
      Re: Bash-like pipes in Python Chris Angelico <rosuav@gmail.com> - 2016-03-18 01:36 +1100
      Re: Bash-like pipes in Python Random832 <random832@fastmail.com> - 2016-03-17 12:31 -0400
      Re: Bash-like pipes in Python Sivan Greenberg <sivan@vitakka.co> - 2016-03-17 19:20 +0200

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