from openpyxl import Workbook, worksheet, load_workbook
wb: Workbook = load_workbook(filename="data.xlsx")
ws: worksheet = wb.active
end_column = ws.max_column
start_column = 1
column_index = start_column
while column_index <= end_column:
# here we just want first row
print(ws.cell(1, column_index).value)
column_index += 1