How do I do this splatization in Flask without being SO FREAKING UGLY?

flask_splat.py

# Enable /emails and /emails/ to serve the last 20 emaildb in our inbox unless otherwise specified
default_offsets={'offset1': 0, 'offset2': 0 + config.EMAIL_RANGE}
@app.route('/', defaults=default_offsets)
@app.route('/emails', defaults=default_offsets)
@app.route('/emails/', defaults=default_offsets)
@app.route("/emails/<int:offset1>/<int:offset2>")
def list_emaildb(offset1, offset2):
  offset1 = int(offset1)
  offset2 = int(offset2)
  emails = emaildb.find()[offset1:offset2] # Uses a MongoDB cursor
  nav_offsets = get_offsets(offset1, offset2, config.EMAIL_RANGE)
  data = {'emails': emails, 'nav_offsets': nav_offsets, 'nav_path': '/emails/'}
  return render_template('partials/emails.html', data=data)