How to call an Applescript from Python on Mac?

applescript_from_mac.py

import subprocess, sys
applescript='''
tell application "System Events"
    set processName to name of processes whose frontmost is true
    do shell script "echo " & processName
end tell
'''
args = [item for x in [("-e",l.strip()) for l in applescript.split('\n') if l.strip() != ''] for item in x]
proc = subprocess.Popen(["osascript"] + args ,stdout=subprocess.PIPE )
progname = proc.stdout.read().strip()
sys.stdout.write(str(progname))