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How to print override data with using multiple docker images in single Dockerfile?

I foubd out that if I use multiple docker images in single Dockerfile , the second one would always override or delete the data installed in former one , for example :

FROM nvidia/cuda:10.2-cudnn8-devel-ubuntu18.04
FROM python:3.8.10
CMD ["/bin/bash"]

The cuda-10.2 installed from former one is gone...But what I want is to have data installed from both docker images I use . Is there any way to achieve it ?