python timeit and subprocess

subprocess_timing.py

import subprocess
from timeit import Timer

args = ("./a.out")
output = False

def timing():
    popen = subprocess.Popen(args, stdout=subprocess.PIPE)
    popen.wait()
    return 
    if output:
        print(popen.stdout.read())
    
t=Timer(timing)
print(t.timeit(1000))