from pattern.en import tag raise BadZipFile in Chapter 6

[LittleTemple]

When i run the code in Chapter 6,I got the following error:
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/zipfile.py", line 1267, in _RealGetContents raise BadZipFile("File is not a zip file") zipfile.BadZipFile: File is not a zip file

I tried to use pattern3 but it doesn't work.Google has little about this. I can't solve it.
It would be great if someone who have gone through this problem tells me how to solve it. thanks a lot!