Slack messages via Python

send_to_slack.py

import os
import socket
import slack
import slack.chat
from optparse import OptionParser, OptionGroup

G_USERNAME = 'MY_USERNAME'
G_CHANNEL = '#MY_CHANNEL'

G_API_TOKEN = 'MY_API_TOKEN'

class slackmsg:
    def __init__(self, key, username=G_USERNAME, channel=G_CHANNEL):
        self.key = key
        self.username = username if username else G_USERNAME
        self.channel = channel if channel else G_CHANNEL
        slack.api_token = self.key

    def post(self, message):
        slack.chat.post_message(self.channel, message, username=self.username)
        
def main():
    parser = OptionParser()
    parser.add_option('--chan',   dest='channel',   help='Channel name')
    parser.add_option('--user',   dest='username',  help='Post message using username')
    parser.add_option('--msg',    dest='msg',       help='Message to post to channel')
    (options, args) = parser.parse_args()

    if len(sys.argv) == 1 or options.msg == None:
        parser.print_help()
        sys.exit(1)
    
    pss = slackmsg(G_API_TOKEN, options.username)
    pss.post(t_msg)
    
if __name__ == '__main__':
    main()