I've released a script to update (or send other commands) to a Mikrotik list via SSH.
The script builds on work already done by Phillip Hutchison and Kevin Byrd.
https://github.com/rollopack/MikroTik-Mass-Updater/
'/interface/print'
('/user/add', {
'name': 'newuser',
'password': 'userpass',
'group': 'read'
})
custom_commands = [
# Simple command
'/system/clock/print',
# Command with parameters
('/user/add', {
'name': 'monitor',
'password': 'secret123',
'group': 'read'
}),
# Another simple command
'/user/print'
]