Call Applescripts from Python

applescript.py

#!/usr/bin/python

# From http://www.leancrew.com/all-this/2013/03/combining-python-and-applescript/
# Updated for Python 3

import subprocess

def asrun(ascript):
    "Run the given AppleScript and return the standard output and error."

    result = subprocess.run(
        ['osascript', '-'],
        input=ascript,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        universal_newlines=True,
        check=True
    )
    return result.stdout

def asquote(astr):
    "Return the AppleScript equivalent of the given string."

    astr = astr.replace('"', '" & quote & "')
    return '"{}"'.format(astr)

if __name__ == '__main__':
    
    # Exmaple usage
    
    subject = 'A new email'

    body = '''This is the body of my "email."
    I hope it comes out right.

    Regards,
    Dr. Drang
    '''
    ascript = '''
    tell application "Mail"
      activate
      make new outgoing message with properties {{visible:true, subject:{0}, content:{1}}}
    end tell
    '''.format(asquote(subject), asquote(body))

    print(ascript)
    asrun(ascript)