Django middleware for wrapping ampersands in a span

ampersands.py

# Requires BeautifulSoup

class Ampersands(object):
	from BeautifulSoup import BeautifulSoup
	import re
	def process_response( self, request, response ):
		if response.has_header('Content-Type') and response['Content-Type'].startswith('text/html') and request.META['PATH_INFO'][0:7] != '/admin/':
			content = BeautifulSoup(response.content)
			try:
				for t in content.body.findAll(text = re.compile( r'.*&.*' )):
					text = unicode(t)
					if not str(t.parent) == '<span class="amp">&amp;</span>':
						text = text.replace('&amp;', '<span class="amp">&amp;</span>')
						t.replaceWith(text)
				response.content = content
			except:
				pass
		return response