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I want to run a process from a python script, blocking while it runs, and writing the output of the process to stdout.

How would I do this?

I looked at the documentation for 'subprocess' but couldn't work it out.

Editing this question to explain how it's different, as requested: See existing text above: and writing the output of the process to stdout

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  • Printing to stdout: stackoverflow.com/questions/2082850/… Commented Mar 3, 2016 at 11:59
  • Thanks - waiting until the command is done is one aspect of what I'm after. I could achieve that with call, I think (that's what I've found). One extra feature is that I also want the output to be streamed to my console. Commented Mar 3, 2016 at 12:13
  • why not just use subprocess.check_call([command])? Commented Mar 3, 2016 at 12:17

2 Answers 2

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You can use the wait() method for that.

For example:

# main_script.py #some code p1 = subprocess.Popen(['/path/to/process.sh'], shell=True) p1.wait() #rest of code when process is done
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you can use object.communicate()[0]

p=subprocess.Popen(["python","1st.py"],stdin=PIPE,stdout=PIPE) print p.communicate()[0] Communicate() will hold the last processed process output.
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