Python post osx notification

You should install terminal-notifier first with Ruby for example:

$ [sudo] gem install terminal-notifier

And then you can use this code:

import os

# The notifier function
def notify(title, subtitle, message):
    t = '-title {!r}'.format(title)
    s = '-subtitle {!r}'.format(subtitle)
    m = '-message {!r}'.format(message)
    os.system('terminal-notifier {}'.format(' '.join([m, t, s])))

# Calling the function
notify(title    = 'A Real Notification',
       subtitle = 'with python',
       message  = 'Hello, this is me, notifying you!')

And there you go:

All the other answers here require third party libraries; this one doesn't require anything. It just uses an apple script to create the notification:

import os

def notify(title, text):
    os.system("""
              osascript -e 'display notification "{}" with title "{}"'
              """.format(text, title))

notify("Title", "Heres an alert")

Note that this example does not escape quotes, double quotes, or other special characters, so these characters will not work correctly in the text or title of the notification.

Update: This should work with any strings, no need to escape anything. It works by passing the raw strings as args to the apple script instead of trying to embed them in the text of the apple script program.

import subprocess

CMD = '''
on run argv
  display notification (item 2 of argv) with title (item 1 of argv)
end run
'''

def notify(title, text):
  subprocess.call(['osascript', '-e', CMD, title, text])

# Example uses:
notify("Title", "Heres an alert")
notify(r'Weird\/|"!@#$%^&*()\ntitle', r'!@#$%^&*()"')