Install python 3.7 on top of java image jdk8 image

I want to install python 3.7 on top of jdk8 java image.

I am using this but its installing python 3.5. i want to install python 3.7-

FROM openjdk:8-jdk-stretch
RUN apt-get update 
    && apt-get install -y python3

Thanks.

Source: StackOverflow