Add reStructuredText support for Juptyer notebooks

Question

I needed to view reStructuredText files in JupyterLab, and the best I found so far was @akaihola's answer to a related issue on github.

I added a work around that would allow rendering the file without viewing the source, provided below.

Answer 1

In case anyone else may need it, here's the solution I am working with for now:

import docutils.core
import docutils.writers.html5_polyglot
from IPython.core.magic import register_cell_magic, register_line_magic
from IPython.display import HTML

@register_cell_magic
def rst(line, cell):
    "Render ReStructuredText"
    writer = docutils.writers.html5_polyglot.Writer()
    return HTML(docutils.core.publish_string(cell, writer=writer).decode('UTF-8'))

@register_line_magic
def rstfile(filename):
    "Render ReStructuredText"
    writer = docutils.writers.html5_polyglot.Writer()
    with open(filename, 'r') as file:
        cell = file.read()
    return HTML(docutils.core.publish_string(cell, writer=writer).decode('UTF-8'))

To view the rst file, without the source:

%rstfile <your-rst-filename>

To use the original solution, as an rst cell, showing both the ReStructuredText source and the rendered output:

%%rst
============
 Main title
============

Some **heavy** markup.