the workbook's Unprotect function do not work

[fightingpjh]

According to : https://docs.microsoft.com/zh-CN/office/vba/api/excel.workbook.unprotect
code:
xcl = win32com.client.Dispatch('Excel.Application')
xcl.visible = True
pw_str = raw_input("Enter password: ")
try:
wb = xcl.workbooks.open(filename, 0, False, None, pw_str, pw_str)
except Exception as e:
print "Error:", str(e)
sys.exit()
wb.Unprotect(pw_str)
wb.UnprotectSharing(pw_str)
wb.Save()
xcl.Quit()

it does't work, the excel file still protected.

[mhammond]

See https://github.com/mhammond/pywin32#support for support requests.