@register.filter(is_safe=False)
def add(value, arg):
    """Adds the arg to the value."""
    try:
        return int(value) + int(arg)
    except (__HOLE__, TypeError):
        try:
            return value + arg
        except Exception:
            return ''
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/template/defaultfilters.py/add