scrapy crawl v2ex 出错了

[xinmans]

包都pip install了 return _bootstrap._gcd_import(name[level:], package, level) File "", line 1014, in _gcd_import File "", line 991, in _find_and_load File "", line 975, in _find_and_load_unlocked File "", line 671, in _load_unlocked File "", line 848, in exec_module File "", line 219, in _call_with_frames_removed File "/home/xinmans/mydev/v2ex_scrapy/v2ex_scrapy/spiders/V2exSpider.py", line 7, in from v2ex_scrapy.DB import DB File "/home/xinmans/mydev/v2ex_scrapy/v2ex_scrapy/DB.py", line 7, in from v2ex_scrapy.items import ( File "/home/xinmans/mydev/v2ex_scrapy/v2ex_scrapy/items.py", line 13, in class Base(DeclarativeBase): File "/home/xinmans/mydev/v2ex_scrapy/v2ex_scrapy/items.py", line 15, in Base list[str]: JSON, TypeError: 'type' object is not subscriptabl