Slackにincoming webhook経由でpythonからメッセージをPOSTする ref: http://qiita.com/satoshi03/items/14495bf431b1932cb90b

file0.txt

> import slackweb
> slack = slackweb.Slack(url="<コピーしたURL>")
> slack.notify(text="This is a test.")

file1.txt

> slack.notify(text="This is a *test*.", channel="#coffee", username="coffee-bot", icon_emoji=":coffee", mrkdwn=True)

file2.txt

> attachments = []
> attachment = {"title": "Sushi",
                "pretext": "Sushi _includes_ gunkanmaki",
                "text": "Eating *right now!*",
                "mrkdwn_in": ["text", "pretext"]}
> attachments.append(attachment)
> slack.notify(attachments=attachments)