slacker_example.py

import slacker

if __name__ == '__main__':
    token = '<your token>'
    slack = slacker.Slacker(token)
    username = 'Do Stuff Bot'
    channel = '#notifications'
    text = "This is a message."
    attachments = [{
        "fallback": "Somebody did something somewhere.",
        "color": "good",
        "pretext": "somebody did something",
        "author_name": "somedude",
        "text": "http://somewhere.example.com",
        "fields": [{
            "title": "Important Thing",
            "value": "Whosawhamuchit",
            "short": True
        }, {
            "title": "Value",
            "value": "9000+",
            "short": True
        }]
    }]

    slack.chat.post_message(
        channel,
        text,
        attachments=attachments,
        username=username
    )