created below cdk python code to revoke default security group egress and ingress rule, but this is not working, need suggestion

[Rekhaiiap]

vpc_security_group_default_iterator = self.vpc.vpc_default_security_group
vpc_security_group_default_iterator(GroupNames=['default'])
for vpc_security_group_default_it in vpc_security_group_default_iterator:
vpc_security_group_default_it.revoke_ingress_rule()
vpc_security_group_default_it.revoke_egress_rule()