小编Gla*_*duo的帖子

from views import app
    mongo = PyMongo(app)
    print mongo.db.activity.count()

因为我正在尝试使用Pymongo count()

它提升了

File "Z:\Activities\modules.py", line 9, in set_id
    mongo = PyMongo(app)
  File "D:\Python27\lib\site-packages\flask_pymongo\__init__.py", line 98, in __init__
    self.init_app(app, config_prefix)
  File "D:\Python27\lib\site-packages\flask_pymongo\__init__.py", line 122, in init_app
    raise Exception('duplicate config_prefix "%s"' % config_prefix)
Exception: duplicate config_prefix "MONGO"

但事实上我使用默认值.我该怎么办？