Question

I have a command to run from python program

python test.py arg1 arg2 

If I run it using

os.system("python test.py arg1 arg2")

it runs.

I want to use subprocess.Popen() but when I do that

subprocess.Popen("python test.py arg1 arg2")

It gives the following error

raise child_exception
OSError: [Errno 2] No such file or directory

Any ideas?

Thanks a lot

Answer 1

If argument to Popen is a string, it tries to execute it as 'sh <argument>', so in your case it becomes 'sh python test.py arg1 arg2' that is obviously wrong. You can pass it a list (as twall suggested), or specify shell=True parameter. The next should work:

subprocess.Popen("python test.py arg1 arg2", shell=True)