遍历redis数据库中有以格式为prefix_*的按照key-value方式存储的key，并打印其值.
遍历使用scan，因为keys prefix_*可能会造成redis长时间阻塞。
查询使用pipeline减少交互，提高效率。
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
附上其他网页的代码，参考下吧
# 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)
以上所述就是本文的全部内容了，希望大家能够喜欢。