code: def revoke_ip_permission(
          self, group_name, ip_protocol, from_port, to_port, cidr_ip):
          
          d = self.revoke_security_group(
              group_name,
              ip_protocol=ip_protocol, from_port=from_port, to_port=to_port,
              cidr_ip=cidr_ip)
          return d
docs: This is a convenience function that wraps the "authorize ip
          permission" functionality of the C{authorize_security_group} method.
  
          For an explanation of the parameters, see C{revoke_security_group}.