Save the data to MongoDB redis

Persistence operations redis # data ----> MongoDB 
Import Redis 
from pymongo Import MongoClient 
Import json 

# reptile simple distributed: more url into the list, not inside parked URL, the value of the program cycle, 
# can url into redis, the values from multiple machines in redis crawling data, simple distributed 

# instantiated redis client 
redis_client = redis.Redis (Host = '127.0.0.1', Port = 6379) 

# instantiated MongoDB client 
mongo_client = MongoClient (Host = '127.0.0.1', Port = 27017) 

# links MongDB specified database, a set of 
DB = mongo_client [ 'the HN'] 
COL = DB [ 'the HN'] 
# cycles using the data redis are all written to the MongoDB 
the while True: 
    # retrieve data from the redis 
    #blpop out the parameter value is the name of the named list of key-value in redis, 
    # name system similar to the file name generated default reptile, shape as => (reptiles name: items) 
    Key, Data = redis_client.blpop ([ 'hn_spider: items']) 
    Print ( 'Key', Key)
    Print ( 'Data', Data) 
    # json.loads () function is to convert the data format of a dictionary json 
    # MongoDB write data into the 
    col.insert_one (json.loads (data.decode ())) 


# close the database 
mongo_client .close ()