Shell command advice

[AntoineD]

Hi Tomer,
what would be a good way to implement this command

diff <(sed 's/pattern//g' file1) <(sed 's/pattern//g' file2)

where pattern, file1 and file2 would change from one execution to another?

[tomerfiliba]

def mydiff(file1, file2, pattern):
    return diff(sed("s/%s//g" % (pattern), file1), sed("s/%s//g" % (pattern), file2))

?

[AntoineD]

This is what I tried at first, but it does not work, the diff comand issues a "No such file or directory" error.

[tomerfiliba]

Because you have to first redirect the output of sed to a file for diff to
work. I guess you could implement that behavior in plumbum, but I never did
On Mar 29, 2014 4:54 PM, "Antoine Dechaume" notifications@github.com
wrote:

This is what I tried at first, but it does not work, the diff comand
issues a "No such file or directory" error.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/115#issuecomment-38996132
.

[AntoineD]

I was trying to avoid temporary files, but I can live with them as well.
Thanks Tomer.

[AntoineD]

So I'm trying to redirect sed output to a file and I'm really puzzled, I cannot get it working.
What I understand from the docs is that the following should create a file named foo with the contents of ls

from plumbum.cmd import ls
ls() > 'foo'

But I get no file.

Am I doing it all wrong?

[tomerfiliba]

use (ls > "foo")()

don't forget the () operator runs the process. to create redirections,
etc., you have to first operate on the command object, then execute it.

---

Tomer Filiba
tomerfiliba.com http://www.facebook.com/tomerfiliba
http://il.linkedin.com/in/tomerfiliba

On Mon, Mar 31, 2014 at 5:04 PM, Antoine Dechaume
notifications@github.comwrote:

So I'm trying to redirect sed output to a file and I'm really puzzled, I
cannot get it working.
What I understand from the docs is that the following should create a file
named foo with the contents of ls

from plumbum.cmd import ls
ls() > 'foo'

But I get no file.

Am I doing it all wrong?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/115#issuecomment-39091648
.

[AntoineD]

Thanks Tomer.
I think I got a little confused by the doc, such a simple example could be added for dumb people like me :-)

[tomerfiliba]

why, it's in the cheat sheet:

http://plumbum.readthedocs.org/en/latest/, under "redirection"

---

Tomer Filiba
tomerfiliba.com http://www.facebook.com/tomerfiliba
http://il.linkedin.com/in/tomerfiliba

On Mon, Mar 31, 2014 at 5:15 PM, Antoine Dechaume
notifications@github.comwrote:

Closed #115 #115.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/115
.

[AntoineD]

I know, and now it seems obvious, but the fact is I've been struggling with it, and my feeling is that starting off by a simple example without multiple redirections, pipe or bound argments would help some people.