Python实现遍历数据库并获取key的值

import redis
import hiredis

pool = redis.ConnectionPool(host='127.0.0.1', port=6379, db=0)
r = redis.Redis(connection_pool=pool)

pipe = r.pipeline()
pipe_size = 100000

len = 0
key_list = []
for key in r.scan_iter(match='PREFIX_*', count=100000):
key_list.append(key)
pipe.get(key)
 if len < pipe_size:
 len += 1
else:
 for (k, v) in zip(key_list, pipe.execute()):
 print k, v
 len = 0
 key_list = []

for (k, v) in zip(key_list, pipe.execute()):
 print k, v

# filename itertaorfilefolder 
import os 
import os.path

filePath = raw_input('Enter filepath : ')

#遍历文件夹 
#三个参数：分别返回1.父目录 2.所有文件夹名字（不含路径） 3.所有文件名字 
for parent ,dirnames , filenames in os.walk(filePath): 
  #

输出文件夹信息 for dirname in dirnames: print 'parent is :'+parent print 'dirname is '+ dirname #输出文件信息 for filename in filenames : print 'parent is :'+parent print 'filename is :' + filename #输出文件路径信息 currentPath = os.path.join(parent,filename) print 'the fulll name of the file is :'+ currentPath filesize = os.path.getsize(currentPath)/1024/1024 print 'the file size is : %.3f MB' %(filesize) #删除大于50m的文件 if filesize > 50: delete = raw_input(' are you sure to delete ?') if delete == 'yes': os.remove(currentPath)

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