How to show aws lambda runtime version?

show_ami_version.py

import subprocess
def lambda_handler(event, context):
    """
    Amazon Linux release 2 (Karoo)
    runtime: python3.8
    date: 2020/05/28
    """
    proc = subprocess.run(['cat', '/etc/system-release'], stdout = subprocess.PIPE)
    print(proc.stdout.decode("utf8"))