老师，ppt8.1可以正常运行，但ppt8.2就不能运行，报错如下，请问如何解决：D:\Python\code\ppt8\8.2>python manager.py runserver Traceback (most recent call last): File “manager.py”, line 4, in from application import app,manager File “D:\Python\code\ppt8\8.2\application.py”, line 3, in from flask_script import Manager File “C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\flask_script_init_.py”, line 15, in from flask._compat import text_type ModuleNotFoundError: No module named ‘flask._compat’