[Python] Dynamically fill the entry in tkinter and xlwings

I have an entry widget in my GUI to be dynamically filled with the cell range based on the cells have selected in the spreadsheet.

For example, if I selected A1:F30 in a sheet, it will put the range A1:F30 in the entry widget. below is the portion my entry widget in the GUI

Here is an example of selecting a range from a spreadsheet with in an inputbox that I was able to do. But I want to apply the same concept with a tkinter GUi

wb = xw.books.active
sheet = wb.sheets.active
selectedRange = sheet.api.Application.InputBox(
'Select your range:', Type=8)
selectedRangeAdd = sheet.range(selectedRange.Address)

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