<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def send_slack_message(channel, text):
 """Send a message to Slack"""

    http = httplib2.Http()
    return http.request(SLACK_MESSAGE_URL, 'POST', body=json.dumps({
        'channel': channel,
        'text': text,
    }))