Django code highlight template filter

from pygments import highlight
from pygments.lexers import get_lexer_by_name, PhpLexer
from pygments.formatters import HtmlFormatter
from pygments.util import ClassNotFound


@register.filter
def highlight_code(code, lang):
  if code is not None:
    try:
      # startinline is for PhpLexer so that it doesn't
      # require a <?php
      lexer = get_lexer_by_name(lang, encoding='utf-8', stripall=True, startinline=True)
    except ClassNotFound:
      lexer = get_lexer_by_name('text')
    formatter = HtmlFormatter(encoding='utf-8', style='colorful', linenos='table', cssclass='highlight', lineanchors="line")
    return highlight(code, lexer, formatter)  
  else:
    return code