Is there a way to add arguments as variables to execute a command line instruction from inside a python file

Question

I have a file buyfruits.py this parses the arguments and sends them to a file called buying.py for eg this command: $python buyfruits.py --quantity 20 --amount 50 --fruit apple

will result in buy 20 apples for 50 coins

I want this to take arguments from another file

let's say input.py

amt = input("Enter amount ")
q = input("Enter quantity you want")
what = input("Enter fruit you want to buy ")

i want this input.py file to execute this code

$python buyfruits.py --quantity q --amount amt --fruit what

Answer 1

Use os.system:

import os

amt = input("Enter amount ")
q = input("Enter quantity you want")
what = input("Enter fruit you want to buy ")

os.system("buyfruits.py --quantity %s --amount %s --fruit %s" % (q, amt, what))

or subprocess, if you want to capture the output of buyfruits.py:

import subprocess, shlex # shlex needed for command-line splitting

amt = input("Enter amount ")
q = input("Enter quantity you want")
what = input("Enter fruit you want to buy ")

p = subprocess.Popen(shlex.split("buyfruits.py --quantity %s --amount %s --fruit %s" % (q, amt, what)))
print("output : %s
errors : %s" % p.communicate()) # print output and errors of the process