(self, key)
Remove a rule from filter list
        If the key isn't in the list, do nothing
Remove a rule from filter list
        If the key isn't in the list, do nothing
Remove a rule from filter list If the key isn t in the list do nothing
def del_filter(self, key):
        """
        Remove a rule from filter list
        If the key isn't in the list, do nothing
        """
        if key in self._filter:
            del self._filter[key]
def del_filter ( self , key ) : if key in self . _filter : del self . _filter [ key ]