Untitled

This command works:
./mysql -u rdsbmsperf -prdsbmsperf -e "SELECT aurora_version();" -prdsbmsperf | grep -P '[\d.]+'

But when I have written it like
cmds.append(
            f"engine_public_version=$(/rdsdbbin/oscar/bin/mysql --user={dbuser1} --database={dbname1} -e \"SELECT aurora_version();\" --password={dbpassword1} | grep -oP '[\\d.]+' | tr -d '\\n')"
        )

It gives me empty