How to fix Python ValueError:bad marshal data?

Question

Running flexget Python script in Ubuntu, I get an error:

$ flexget series forget \"Orange is the new black\" s03e01
Traceback (most recent call last):
File \         


        

Answer 1

I solved this problem by the following procedure :

In the error code message, you can see from sqlalchemy.ext.declarative import declarative_base cause this error.

So just pip uninstall sqlalchemy and pip install sqlalchemy, problem solved.