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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def authorize(self, cidr_ip=None, ec2_group=None):
 """ Add a new rule to this DBSecurity group. You need to pass in either a CIDR block to authorize or and EC2 SecurityGroup. @type cidr_ip: string @param cidr_ip: A valid CIDR IP range to authorize @type ec2_group: :class:`boto.ec2.securitygroup.SecurityGroup>` @rtype: bool @return: True if successful. """

        if isinstance(ec2_group, SecurityGroup):
            group_name = ec2_group.name
            group_owner_id = ec2_group.owner_id
        else:
            group_name = None
            group_owner_id = None
        return self.connection.authorize_dbsecurity_group(self.name,
                                                          cidr_ip,
                                                          group_name,
                                                          group_owner_id)