<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def remove_rule(self, ip_protocol, from_port, to_port, src_group_name, src_group_owner_id, cidr_ip):
 """ Remove a rule to the SecurityGroup object. Note that this method only changes the local version of the object. No information is sent to EC2. """

        target_rule = None
        for rule in self.rules:
            if rule.ip_protocol == ip_protocol:
                if rule.from_port == from_port:
                    if rule.to_port == to_port:
                        target_rule = rule
                        target_grant = None
                        for grant in rule.grants:
                            if grant.name == src_group_name:
                                if grant.owner_id == src_group_owner_id:
                                    if grant.cidr_ip == cidr_ip:
                                        target_grant = grant
                        if target_grant:
                            rule.grants.remove(target_grant)
        if len(rule.grants) == 0:
            self.rules.remove(target_rule)