How do I get a slack bot that is sending a message via Python to post @here and ping the channel?

Question

Currently my slack app / bot will post a message being sent via Python that has @here or @channel in the text but the @here or @channel won't be highlighted or actually ping the channel. Here is the code:

import slack
def slack_notif(slackchannel,message):
        client = slack.WebClient(token='xxxmytokenxxx')
        client.chat_postMessage(channel=slackchannel, text=message)
slack_notif(
        slackchannel = 'mychannel',
        message = '<@here> This is a test'
        )

Output = @here This is a test

Intended output:

Answer 1

To use @here & @channel as 'mentions',

they are marked as :

<!here> & <!channel>