在Ubuntu中运行flexget Python脚本，我收到一个错误：
$ flexget series forget "Orange is the new black" s03e01
Traceback (most recent call last):
File "/usr/local/bin/flexget", line 7, in
from flexget import main
File "/usr/local/lib/python2.7/dist-packages/flexget/__init__.py", line 11, in
from flexget.manager import Manager
File "/usr/local/lib/python2.7/dist-packages/flexget/manager.py", line 21, in
from sqlalchemy.ext.declarative import declarative_base
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/ext/declarative/__init__.py", line 8, in
from .api import declarative_base, synonym_for, comparable_using, \
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/ext/declarative/api.py", line 11, in
from ...orm import synonym as _orm_synonym, \
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/__init__.py", line 17, in
from .mapper import (
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/mapper.py", line 27, in
from . import properties
ValueError: bad marshal data (unknown type code)
)
