Tkinter filedialog to browse and select excel file to create Pandas DataFrame using read_excel()

If I want to read a single Excel file every time how I should proceed

Hello! Great video!
I have a question I am using jupyterlab and I am not sure how to run the code after selecting the input file from the filedialog, the kernel just displays the head but the rest of the code does not run, could you provide some information on how to solve this?

Thank you