How can I get the SNS topic ARN using the topic name to publish a SNS message in Python via Boto3?

Question

Python

method to run query

def function(run_query)
   //topic = arn return from topic name
   topic.publish(message)
   pass

I am using the boto3 resource method. There are lot of examples of using boto3.client and limited example of sns method implementation using boto3 resource methods.