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up vote 0 down vote favorite 
def run_cmd(self, cmd):
    print cmd 

    status = os.system(cmd)
    print 'Command ran with Status: %s' % status

    if status:
        s = 'Command Failed: Status: %s for %s' % (status, cmd)
        print s
        sys.exit(status)
    else:
        s = 'Command Success: %s' % cmd 

    return status

I am using this function to run a python script from another script.

Ex: 

command_to_exec = 'python script_b.py'
run_cmd(command_to_exec)

Now if script_b.py fails script_a.py exits with the status.

That's okay.

Case 2:

command_to_exec = 'python script_a.py --options'
rum_cmd(command_to_exec)

This case is script_a.py running 'python script_a.py' from itself. In this case, if newly spawned script_a.py fails, the outer script_a.py is still a success, because it wasn't able to catch the failure of inner script_a.py (because of sys.exit(status))

Now, how do I handle this situation? (If inner script_a fails, outer script_a should exit)

share|improve this question
2  
Why are you calling whole scripts like this? Why not import the 'inner' script, or the parts of it you need, and run those? Like why not call a function in the 'inner' script? – davo36 May 9 at 4:50
    
Use may use subprocess docs.python.org/2/library/subprocess.html#replacing-os-syste‌​m – Ashish May 9 at 4:52
    
You could test sys.argv[0] to prevent running yourself, which could cause a horrible fork bomb (continually spawning process). – cdarke May 9 at 5:42
up vote 0 down vote

You can just run your other script as a module. Let's say you have the folder:
dir
   |---main.py
   |---imported.py
And you want to run the second from the first. Just use import, like that:

import imported #the file name without the extension

It will run that file, and you will be able to use it's vars and functions in your main script.

share|improve this answer
    
It's not possible in my case because I have different options to give to the spawned script. – Dheeraj Chakravarthi May 9 at 7:05
    
Just insert your script into a function, and pass the arguments... – Yotam Salmon May 9 at 15:24

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