Using the subprocess module in python to run a lua script with command line inputs

Question

I have a Lua script with command line inputs that I would like to run in Python (2.7) and read the output. For example the code I would run in terminal (Ubuntu 14.xx) looks like:

lua sample.lua -arg1 helloworld -arg2 "helloworld"

How do I run a Lua script with command line inputs in Python using the subprocess module? I think it would be something like this:

import subprocess

result = subprocess.check_output(['lua', '-l', 'sample'], 
    inputs= "-arg1 helloworld -arg2 "helloworld"")
print(result)

What is the right way to do this?

This is very similar to the link below but different in that I am trying to use command line inputs as well. The below question just calls a Lua function defined in the (Lua) script and feeds the inputs directly to that function. Any help would be very much appreciated.

Run Lua script from Python

mgilson · Accepted Answer · 2016-07-06 04:18:41Z

2

If you aren't sure, you can generally pass the verbatim string that works in the shell and split it with shlex.split:

import shlex
subprocess.check_output(shlex.split('lua sample.lua -arg1 helloworld -arg2 "helloworld"'))

However, you usually don't need to do this and can just split the arguments by hand if you know what they are ahead of time:

subprocess.check_output(['lua', 'sample.lua', '-arg1', 'helloworld', '-arg2', 'helloworld'])

answered Jul 6, 2016 at 4:18

mgilson

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1 Comment

sfortney Over a year ago

This worked for me and looks like the most complete answer. Thanks!

Fujiao Liu · Accepted Answer · 2016-07-06 04:16:57Z

1

try this:

import subprocess

print subprocess.check_output('lua sample.lua -arg1 helloworld -arg2 "helloworld"', shell=True)

answered Jul 6, 2016 at 4:16

Fujiao Liu

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1 Comment

sfortney Over a year ago

Thanks for the reply. I tried this one and it didn't quite work. That might just be a function of my code though. Maybe it will help someone else who comes here

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