Python-Markdown extension adding a new block-level syntax (Python3)

 This package extends the functionality of Python Markdown by turning a
 paragraph of text into a block that's specially highlighted and set apart from
 the rest of the text.
 .
 This extension produces the same results as the admonition extension, but with
 a syntax that is much less intrusive and has a very reasonable fallback look
 for "vanilla" renderers.