Using input redirection with Popen in python

Question

I need to use stream redirectiton in Popen call in python to use bat file with wine. I need make this:

wine32 cmd  < file.bat

It works when I run it manually from terminal, however when I try to call it from python:

proc = Popen('wine32 cmd < file.bat',stdout = PIPE)

I got error: No such file or directory

How to manage with that?

Thanks

PM 2Ring · Accepted Answer · 2015-01-24 13:22:03Z

3

Try this:

import sys

#...

with open('file.bat', 'r') as infile:
    subprocess.Popen(['wine32', 'cmd'], 
        stdin=infile, stdout=sys.stdout, stderr=sys.stderr)

Make sure that each argument to wine32 is a separate list element.

edited Jan 24, 2015 at 13:22

answered Jan 24, 2015 at 13:07

PM 2Ring

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3 Comments

Antti Haapala Over a year ago

"With the default settings of None, no redirection will occur; the child’s file handles will be inherited from the parent", thus no need to have stdout, stderr there.

PM 2Ring Over a year ago

@AnttiHaapala: Ah, ok. As you might guess I haven't played with subprocess much. :) Which reminds me I really should update my old scripts that use os.popen & friends...

jfs Over a year ago

@jmmk: stdout=sys.stdout, stderr=sys.stderr are probably unnecessary -- test it.

Community · Accepted Answer · 2017-05-23 11:49:28Z

0

maybe you can check this thread.. https://stackoverflow.com/a/5469427/3445802

from subprocess import Popen
p = Popen("batch.bat", cwd=r"C:\Path\to\batchfolder")
stdout, stderr = p.communicate()

edited May 23, 2017 at 11:49

CommunityBot

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answered Jan 24, 2015 at 12:09

agaust

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9 Comments

jmmk Over a year ago

But I call it from linux through wine. Popen("file.bat" ... won't work here

agaust Over a year ago

are you call using idle?

jmmk Over a year ago

What do you mean? I run python script simply via gnome-terminal

agaust Over a year ago

why not use idle python in ubuntu? there .bat file can be executed with idle (because idle is the default for Windows). I used to use it if I want to run the .bat file ... if the gnome terminal would be in error, because it obviously does not support the .bat file in gnome terminal.

jmmk Over a year ago

Not ubuntu. bat may be executed using stream redirecting as I wrote. I need to get '<' stream redirect working

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