Question

friends,

I have a simple script

import subprocess

subprocess.call(["./run_xf"])

old=open('./inv.mt0','r')

lines=old.readlines()

lines=lines[3:]

new=open('./inv.mt1','w')

new.writelines(lines)

old.close()

new.close()

subprocess.call(["rm", "inv.mt0"], shell=True)

All the codes work except the last one.

run_xf runs hspice and generate inv.mt0. then i copy part of inv.mt0 to inv.mt1. then i want to delete inv.mt0. But this doesn’t work.

For this specific example, it complains rm can’t find operand. But if i write them together, it doesn’t delete the file as well.

thanks

xf

Answer 1

If you are using shell=True you must pass a string to subprocess.call, not a list. See http://docs.python.org/library/subprocess.html#subprocess.call for more details.

However, invoking subprocess with shell=True is not recommended due to security implications. You should remove shell=True and leave the list-style args.