Code to include formatted sources in IPython notebooks.

ipylisting.py

# Some code do include nicely formatted source code listings of external
# files. Unfortunately, these listings will not be included using
# nbconvert to convert the notebook to a PDF.

import IPython
from pygments import highlight
from pygments.lexers import PythonLexer
from pygments.formatters import HtmlFormatter

def include_listing(filename):
    with open(filename) as f:
        code = f.read()

    formatter = HtmlFormatter()
    return IPython.display.HTML('<style type="text/css">{}</style>{}'.format(
        formatter.get_style_defs('.highlight'),
        highlight(code, PythonLexer(), formatter)))