First thank you for this implementation! 👍

I provide a minimal working example of some unexpected behavior I encountered:

import markdown md = markdown.Markdown(extensions=['extra']) html = md.convert("<div markdown><p>Hello _World!_</p></div>") print(html)

The output was

<div> <p><p>Hello <em>World!</em></p></p> </div>

But I expected

<div> <p>Hello <em>World!</em></p> </div>

My workaround is to use two line breaks (edit)

html = md.convert("<div markdown>\n\n<p>Hello _World!_</p></div>")

does not include the additional paragraph, but the Markdown is not replaced.