python +pywin32 操作 Excel

import win32com.client
import time

xlApp = win32com.client.Dispatch("Excel.Application")
xlApp.Visible=1

workBook = xlApp.Workbooks.Open(r"C:\Users\tekibrain\Desktop\datelist.xlsx")
print(str(workBook.ActiveSheet.Cells(1,1)))
now = time.time()
workBook.ActiveSheet.Cells(1, 2).Value = now
#SaveChanges = 1 : Save flle
# SaveChanges = 0 : Nothing Saved
workBook.Close(SaveChanges=1)
xlApp.Quit()