[Python] how to automatically call what(like a function) i want in python terminal

I am self teaching the cs61A course, and when I watch the teaching video, I notice the teacher using some shortcut or bind to quickly repeatedly call on a fucntion, or something that have been used before,to test the output, like in the image how the teacher do

I asked copilot, but was recommended to use some programming to do so, but not a easier way ,I am asking for some help

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