python 用xlwings库每次提示保存出错，不知那出错了？

import xlwings as xw

app=xw.App(visible=True,add_book=False)
workbook=app.books.add()
#app.display_alerts = False
#app.screen_updating = False 
workbook.Save(r"e:\python01\test.xlsx")      -----------出错的节点
workbook.close()
app.quit()

C:\Users\Administrator\PycharmProjects\pythonProject7\venv\Scripts\python.exe C:/Users/Administrator/PycharmProjects/pythonProject7/main.py
Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/pythonProject7/main.py", line 9, in
workbook.Save(r"e:\python01\test.xlsx")
AttributeError: 'Book' object has no attribute 'Save'

Process finished with exit code 1

save是全小写，s改成小写

workbook.save(r"e:\python01\test.xlsx")

如有帮助，望采纳！谢谢!