使用Python将MongoDB的GirdFS的文件导出

import pymongo;                                                #MongoDB操作模块
import gridfs;                                                 #存储桶
client = pymongo.MongoClient("mongodb://localhost:27017")      #获得数据库连接
db = client["trs"]                                             #指定数据库表
fs = gridfs.GridFS(db)                                         #获取gridfs对象
fsb = gridfs.GridFSBucket(db)
files = fs.find()
try:
    i=1
    for file in files:
        print("["+str(i)+"]""finename is :" + file.name)
        file = fs.find_one({"filename":file.name})
        local = open(str(file._id),‘wb+‘)
        stream = fsb.download_to_stream(file._id,local)
        i=i+1
except Exception as e:
    print(str(e))