python - subprocess.call doesn't work as expected -


i have following batch file (test.bat)

my.py < commands.txt

my.py following:

import sys  print sys.stdin.readlines()

everything works fine if launch batch file command line (from cmd.exe shell in windows 7).

but if try run via subprocess.call function python doesn't work.

how try run python:

import subprocess import os  # doesn't work ! rc = subprocess.call("test.bat", shell=true) print rc

and error message get:

>my.py  0<commands.txt traceback (most recent call last):   file "c:\users\.....\my.py ", line 3, in <module>     print sys.stdin.readlines() ioerror: [errno 9] bad file descriptor 1

i'm using python 2.7.2 on 2.7.5 same behavior.

any ideas?

it should be:

rc = subprocess.call(["cmd", "/c", "/path/to/test.bat"])

or using shell:

rc = subprocess.call("cmd /c /path/to/test.bat", shell=true)

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