Pandas Data Frame из части Excel

import openpyxl
import pandas as pd

wb = openpyxl.load_workbook('data.xlsx')
sheet = wb.get_sheet_by_name('Sheet2')
range = ['A3':'D20']   #<-- how to specify this?
spots = pd.DataFrame(sheet.range) #what should be the exact syntax for this?

print (spots)
Pleasant Panther