Python 如何在AWS CDK中指定源安全组Id？

嗨，我在AWS CDK上工作。我正在编写安全组模板。我能用云的形式写出来。现在我正在用AWS CDK编写它。我无法得到任何包含源安全组的示例。下面是我之前写的云形成模板

Resources:
  MerchWebServicesSecurityGroup:
    Type: "AWS::EC2::SecurityGroup"
    Properties:
      Tags:
        - Key: "Name"
          Value: !Ref "AWS::StackName"
      GroupDescription: "EC2 Services Security Group"
      VpcId:
        Fn::ImportValue: "infra-vpc-base::VpcId"
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: "80"
          ToPort: "80"
          SourceSecurityGroupId: !Ref MerchWebServicesLoadBalancerSecurityGroup
        - IpProtocol: tcp
          FromPort: "443"
          ToPort: "443"
          SourceSecurityGroupId: !Ref MerchWebServicesLoadBalancerSecurityGroup
        - IpProtocol: tcp
          FromPort: 31000
          ToPort: 65535
          SourceSecurityGroupId: !Ref MerchWebServicesLoadBalancerSecurityGroup

  MerchWebServicesLoadBalancerSecurityGroup:
    Type: "AWS::EC2::SecurityGroup"
    Properties:
      Tags:
        -
          Key: "Name"
          Value: !Ref "AWS::StackName"
      GroupDescription: "MerchWebServices ALB Group"
      VpcId:
        Fn::ImportValue: "infra-vpc-base::VpcId"
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: '172.30.1.0/15'

在上面的模板中，我创建了SG MerchWebServicesSecurityGroup，并将SourceSecurityGroupId指定为另一个SG MerchWebServicesLoadBalancerSecurityGroup

        #create SG MerchWebServicesLoadBalancerSecurityGroup
        mws_vpc_sg_alb  = ec2.SecurityGroup(self,"MerchWebServicesLoadBalancerSecurityGroup",
        description = "MerchWebServices ALB Group",
        security_group_name = "MerchWebServicesLoadBalancerSecurityGroup",
        vpc= vpc);

        mws_vpc_sg_alb.add_ingress_rule(peer = ec2.Peer.ipv4('172.30.0.0/15'), connection = ec2.Port.tcp(80));

        #create SG MerchWebServicesSecurityGroup
        mws_vpc_sg = ec2.SecurityGroup(self,"MerchWebServicesSecurityGroup",
        description="EC2 Services Security Group",
        security_group_name="MerchWebServicesSecurityGroup",
        vpc = vpc);
        mws_vpc_sg.add_ingress_rule(peer = ec2.Peer.ipv4(mws_vpc_sg_alb), connection = ec2.Port.tcp(80));

在上面的代码中，我试图创建SG MerchWebServicesSecurity组，下面我添加了入口规则

mws_vpc_sg.add_ingress_rule(peer = ec2.Peer.ipv4(mws_vpc_sg_alb), connection = ec2.Port.tcp(80));

---

这里不是指定Cidr块，而是指定SourceSecurityGroupId。在AWS CDK中，我不确定如何使用Ref并包括SourceSecurityGroupId。有人能帮我完成这个吗？任何帮助都将不胜感激。谢谢

ec2.SecurityGroup实现了IPER接口，因此安全组本身可以用作对等方

mws_vpc_sg_alb.add_ingress_rule(
     peer=mws_vpc_sg_alb,
     connection=ec2.Port.tcp(80),
     description='ALB access'
)