CODEWITHSUNDEEP
pythonsubprocessexecutable
Ibe
Ibe

Reputation: 6035

How to run external executable using Python?

I have an external executable file which I am trying to run from a Python script. CMD executable runs but without generating output. Probably it exit before output can be generated. Any suggestion about how to delay exit until outputs are generated?

import subprocess, sys
from subprocess import Popen, PIPE
exe_str = r"C:/Windows/System32/cmd C:/temp/calc.exe"

parent = subprocess.Popen(exe_str, stderr=subprocess.PIPE)

Upvotes: 30

Views: 153700

Answers (4)

sgrieve
sgrieve

Reputation: 652

The os.system method is depreciated and should not be used in new applications. The subprocess module is the pythonic way to do what you require.

Here is an example of some code I wrote a few weeks ago using subprocess to load files, the command you need to use to delay exit until data has been received and the launched program completes is wait():

import subprocess

cmd = "c:\\file.exe"
process = subprocess.Popen(cmd, stdout=subprocess.PIPE, creationflags=0x08000000)
process.wait()

On Windows platforms, creationflags=0x08000000 is an optional parameter that suppresses the launch of a window, which can be useful if the program you are calling does not need to be directly seen.

Upvotes: 15

DIVYA RATHOD
DIVYA RATHOD

Reputation: 227

This worked for me after trying everything else: Change the location of your python program to be the same as where the .exe is located. And then the simple:

subprocess.call("calc.exe")

would work.

Upvotes: 0

Sykam Sreekar Reddy
Sykam Sreekar Reddy

Reputation: 151

Option 1

import subprocess

subprocess.call('C:\Windows\System32\calc.exe')

Option 2

subprocess.Popen(['C:\Windows\System32\calc.exe'],stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True).communicate()

Option 3

import os
os.system('C:\Windows\System32\calc.exe')

Upvotes: 7

urcm
urcm

Reputation: 2284

use subprocess.call, more info here:

import subprocess
subprocess.call(["C:\\temp\\calc.exe"])

or 

import os
os.system('"C:/Windows/System32/notepad.exe"')

i hope it helps you...

Upvotes: 23

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