[Python] emacs python pdb restart debugging sesson

I am using Emacs to edit and debug python code and I would like to know how to restart my debugging session within emacs pdb with a single letter command. In perldb, there is a single command R that equates to restart the script, but I can't find the equivalent one-letter instruction for restart in python.

Is there a way to hook up R to do restart in pdb?

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