MongoDB
>>> kl
Collection(Database(Connection('localhost', 27017), 'blog'), 'kl')
>>> for d in kl.find():
... print(d)
...
{'title': 'my first blog', '_id': ObjectId('52a95f90663e8e1f03a20cec'), 'date': 'Thu Dec 12 14:49:15 2013', 'content': '试试中文'}
{'title': 'my 2nd blog', '_id': ObjectId('52a963e1663e8e1f03a20ced'), 'date': 'Thu Dec 12 15:20:45 2013', 'content': '第二篇博文'}
>>> kl.update({'title':'my first blog'},{'$SET':{'content':'第一篇博文'}})
>>> for k in kl.find():
... print(k)
...
{'title': 'my first blog', '_id': ObjectId('52a95f90663e8e1f03a20cec'), 'date': 'Thu Dec 12 14:49:15 2013', 'content': '试试中文'}
{'title': 'my 2nd blog', '_id': ObjectId('52a963e1663e8e1f03a20ced'), 'date': 'Thu Dec 12 15:20:45 2013', 'content': '第二篇博文'}
kl.update({'title':'my first blog'},{'$set':{'content':'第一篇博文'}, upsert-False, multi=False})试试这个。