apprise_html_fed_slack_message.py

# Send 'HTML' content to Slack via Apprise.
# At this time (Mar 12th, 2021), Apprise can not convert HTML -> Markdown
# but luckily there are lots of tools that can do this for you:
# here is one; Requirement:
#   > pip install html2markdown

import html2markdown
import apprise

# convert your HTML code to it's markdown equivalent:
md_body = html2markdown.convert('<h2>Test Header</h2>\r\n<p>Message Body</p>')

# Create an Apprise instance
apobj = apprise.Apprise()

# Add at least one service you want to notify
apobj.add('slack://auth-details?format=markdown')

# Send your message
apobj.notify(
    title='Title',
    body=md_body,
    body_format='markdown',
)