mongodb存储文件

使用如下代码对mongodb进行文件的存入与读取

from pymongo import MongoClient
from gridfs import *
# 存入mongodb
#链接mongodb
client=MongoClient('localhost',27017)
#取得对应的collection
db=client.pdf
datatmp = open('test.pdf', 'rb')
imgput = GridFS(db)
insertimg=imgput.put(datatmp,content_type='pdf',filename='test',is_do=0)
datatmp.close()
print("js")

#读取mongodb
gridFS = GridFS(db)
count=0
for grid_out in gridFS.find({'is_do':0}):
    count+=1
    print(count)
    print(grid_out.filename)
    data = grid_out.read() # 获取图片数据
    outf = open('test2.pdf','wb')#创建文件
    outf.write(data)  # 存储图片
    outf.close()
print('end')