JDBC connection in a python lambda program using py4j

I am trying to use JDBC connection in a python Lambda function. I uploaded the py4j zip as a layer for this Lambda function. I did import py4j. It says No module named py4j. MY program is to test the JDBC connection. No need to do any SQL queries.

import py4jfrom py4j.java_gateway import java_import

How to fix this error No module named py4j?