Set MS Outlook as default email application in macOS

set_outlook_as_default_application.py

#!/usr/bin/python

"""
set_outlook_as_default_application.py

Description:
Set Outlook as a default application for email, calendar and contacts

"""

import sys
from SystemConfiguration import SCDynamicStoreCopyConsoleUser
from LaunchServices import LSCopyDefaultRoleHandlerForContentType
from LaunchServices import LSSetDefaultRoleHandlerForContentType
from LaunchServices import LSCopyDefaultHandlerForURLScheme
from LaunchServices import LSSetDefaultHandlerForURLScheme

##### EDIT THESE DICTIONARIES ===>

UTI_HANDLER_DICT = {
    'com.apple.mail.email': 'com.microsoft.outlook',
    'com.microsoft.outlook16.email-message': 'com.microsoft.outlook',
    'public.vcard': 'com.microsoft.outlook',
    'com.apple.ical.ics': 'com.microsoft.outlook',
    'com.microsoft.outlook16.icalendar': 'com.microsoft.outlook'
}

URL_SCHEME_DICT = {'mailto': 'com.microsoft.outlook'}

#####

# Obj-C LSRolesMask constant kLSRolesAll hexadecimal representation is 0xFFFFFFFF
LS_ROLES_MASK = 0xFFFFFFFF

#####

def set_handler():

    # Iterate dictionary (key: UTI / content type, value: handler / application)
    for content_type, ls_handler in UTI_HANDLER_DICT.iteritems():

        # Change handler
        print 'Changing default handler: %s for content type: %s' % (ls_handler, content_type)
        try:
            LSSetDefaultRoleHandlerForContentType(content_type, LS_ROLES_MASK, ls_handler)
        except Exception, e:
            print e
            sys.exit('Could not change content type handler. Exiting.')
            

def set_scheme():

    # Iterate dictionary (key: url scheme, value: handler / application)
    for scheme, ls_handler in URL_SCHEME_DICT.iteritems():

        # Change handler
        print 'Changing default handler: %s for url scheme: %s' % (ls_handler, scheme)
        try:
            LSSetDefaultHandlerForURLScheme(scheme, ls_handler)
        except Exception, e:
            print e
            sys.exit('Could not change content type handler. Exiting.')

#####

def main():

    set_scheme()
    set_handler()

if __name__ == "__main__":
    main()