show syntax hightlight in jupyter notebook

# cheap immitation of %pycat

from IPython.core.display import display, HTML
from pygments import highlight
from pygments.lexers import PythonLexer
from pygments.formatters import HtmlFormatter

def show(filename):
    text = !cat $filename
    text = '\n'.join(text)
    html = highlight(text, PythonLexer(), HtmlFormatter())
    display(HTML(html))

display(HTML("""
<style>
{pygments_css}
</style>
""".format(pygments_css=HtmlFormatter().get_style_defs('.highlight'))))