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    <p>Importing a module is different from executing it as a script. If you don't trust the child Python script; you shouldn't run any code from it. </p> <p>A regular way to use some code from another Python module:</p> <pre><code>import another_module result = another_module.some_function(args) </code></pre> <p>If you want to execute it instead of importing:</p> <pre><code>namespace = {'args': [1,2,3]} # define __name__, __file__ if necessary execfile('some_script.py', namespace) result = namespace['result'] </code></pre> <p><a href="http://docs.python.org/2/library/functions.html#execfile" rel="nofollow noreferrer"><code>execfile()</code></a> is used very rarely in Python. It might be useful in a debugger, a profiler, or to run <code>setup.py</code> in tools such as <code>pip</code>, <code>easy_install</code>.</p> <p>See also <a href="http://docs.python.org/2/library/runpy.html" rel="nofollow noreferrer"><code>runpy</code> module</a>.</p> <p>If another script is executed in a different process; you could use many <a href="http://en.wikipedia.org/wiki/Inter-process_communication" rel="nofollow noreferrer">IPC methods</a>. The simplest way is just pipe serialized (Python objects converted to a bytestring) input args into subprocess' stdin and read the result back from its stdout as <a href="https://stackoverflow.com/a/16877343/4279">suggested by @kirelagin</a>:</p> <pre><code>import json import sys from subprocess import Popen, PIPE marshal, unmarshal = json.dumps, json.loads p = Popen([sys.executable, 'some_script.py'], stdin=PIPE, stdout=PIPE) result = unmarshal(p.communicate(marshal(args))[0]) </code></pre> <p>where <code>some_script.py</code> could be:</p> <pre><code>#!/usr/bin/env python import json import sys args = json.load(sys.stdin) # read input data from stdin result = [x*x for x in args] # compute result json.dump(result, sys.stdout) # write result to stdout </code></pre>
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    1. POGetting return infromation from another python script
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    1. POGetting return infromation from another python script
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    1. COThanks! I ended up piping it, but because the data-size was acceptably small and easy to model as a string, I didn't need to serialize it.
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