How to get cfnoutputs of AWS stack to a file using AWS-CDK

I want to store the Cfnoutputs in AWS-CDK to a file(Python).

Below is the code to show Public IP on console.

               my_ip = core.CfnOutput(
                                        scope=self,
                                        id="PublicIp",
                                        value=my_ec2.instance_public_ip, 
                                        description="public ip of my instance", 
                                        export_name="my-ec2-public-ip")

I have tried using redirecting the output in Python by using command:

                                       cdk deploy * > file.txt

But no success.

Please help