Security group for cdktf python , error

Terraform
1

sbnt=“41.79.199.24/32”

    SecurityGroup(self ,"secure1" , name="sec1grp" , vpc_id="vpclink"

    , ingress=Sequence[SecurityGroupIngress(

      cidr_blocks=Sequence[sbnt] ,

      from_port=22  ,

      to_port=22 ,

      protocol= "tcp"

    )])

error and any solution