This program duplicates the window that this tutorial creates.
When using tkinter 41 lines of code are used. This PySimpleGUI program uses 19 That makes the PSG program roughly 43% the size of the tkinter program, which is within the estimates of 1/2 to 1/10.
Because this is a "data entry" type window, care was taken to clear the fields after the record was submitted and the cursor (focus) was placed back up at the name field, ready for a new record to be added.
This is a screenshot of the tkinter version
And this is what the PySimpleGUI window produces