Calling Python script from another and passing List(sys.argv) as argument

Question

test1.py is the main script calling another script test2.py by passing the same argument list that has been passed to test1.py. I have done following but it reads the sys.argv list as string and parse into multiple arguments and also includes unnecessary [ and ,

test1.py
import os
import sys

argList=sys.argv[1:]

os.system('python another/location/test2.py %s'%(argList))

test2.py

import sys
print(sys.argv[1:])

Call test1.py
python test1.py -a -b -c
output: ['[-a,' ,'-b,', '-c]' ]

Please post if there is a better opti

When you do the string formatting, what is argList converted into? It's not quite what you expect. You want some way to format argList yourself...look into the join method of a string. — li.davidm
– li.davidm, Commented Oct 9, 2013 at 22:38

Noctua · Accepted Answer · 2013-10-09 22:44:10Z

1

Use

os.system('python another/location/test2.py %s' % ' '.join(argList))

if the arguments will contain no spaces themselves.

The second program will output

['-a', '-b', '-c']

If your arguments can contain spaces, it might be best to quote them. Use ' '.join("'%s'" % arg.replace("'", "\\'") for arg in ArgList)

edited Oct 9, 2013 at 22:44

answered Oct 9, 2013 at 22:38

Noctua

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2 Comments

creativeDrive Over a year ago

Thank you, what is the use of join() ? will it append all List element with the separator ' '(space) ?

Noctua Over a year ago

Indeed. string.join(list) will do list[0] + string + list[1] + ... (but it's better).

asat · Accepted Answer · 2019-12-04 15:15:05Z

0

in the case if you need to exit test1.py just after calling test2.py

import subprocess
subprocess.Popen( ('python', 'another/location/test2.py') + tuple( sys.argv[1:]) )

answered Dec 4, 2019 at 15:15

asat

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