Run Perl file with integer arguments from a Python script

Question

I am trying to run the Perl script rtpc.pl from a Python script from the command line with two input arguments. Normally, I run the Perl script from the command line with two arguments:

perl rtpc.pl [ARG1] [ARG2]

What I want is a separate python script that I can call from the command line that I can input [ARG1] and [ARG2] into while compiling the Perl script rtpc.pl.

Something like:

python3 pyscript.py

So far, in my python script, I am using the subprocess module, but I am a little unsure how to pass arguments for my perl script.

pipe = subprocess.Popen(["perl", "rtpc.pl"], stdout=subprocess.PIPE)

How would I input the arguments needed to equivalently run the Perl script terminal command? I should also mention that the shell that I am using is tcsh.

In python 3.5+ you want subprocess.run. The Popen is an "underlying interface" recommended for "more advanced" needs — zdim
– zdim, Commented Aug 19, 2022 at 1:21

Barmar · Accepted Answer · 2022-08-19 00:50:08Z

1

Add them to the list you pass to subprocess.Popen().

arg1 = 'foo'
arg2 = 'bar'
pipe = subprocess.Popen(["perl", "rtpc.pl", arg1, arg2], stdout=subprocess.PIPE)

answered Aug 19, 2022 at 0:50

Barmar

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3 Comments

Austin Over a year ago

Do the arguments have to be encased in quotes? And can I pass integers?

Silvio Mayolo Over a year ago

You're starting a subprocess. That's done by passing a finite number of strings to a program. That's nothing specific to Python; that's how processes work at a fundamental level.

Barmar Over a year ago

@Austin The arguments are all strings. You can convert integers with str(variable).

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