How to restart kernel in python through code in sp

Question

I am ensemble 2 models in syder. ( A RNN and an encoder-decoder both running on same data set). Each of them has 100 models saved in .h5 format. After loading and running RNN if I try to load models for Encoder-Decoder the system becomes slow. The solution that I found was to restart the kernel by pressing ctrl+. . How do I automate it through code so that both the models can be run in single script?