Python traverses the database and obtains the key value.
Traverse the Redis database with keys stored in key-value mode in the format of PREFIX _ * and print their values.
SCAN is used for traversal, because keys prefix _ * may cause Redis to block for a long time.
Query uses pipeline to reduce interaction and improve efficiency.
import redisimport hiredispool = redis.ConnectionPool(host='127.0.0.1', port=6379, db=0)r = redis.Redis(connection_pool=pool)pipe = r.pipeline()pipe_size = 100000len = 0key_list = []for key in r.scan_iter(match='PREFIX_*', count=100000):key_list.append(key)pipe.get(key) if len < pipe_size: len += 1else: 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
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# Filename itertaorfilefolder import OS. pathfilePath = raw_input ('enter filepath: ') # traverse folders # three parameters: return 1. parent directory 2. all folder names (excluding paths) 3. all file names are for parent, dirnames, and filenames in OS. walk (filePath): # Output Folder Information for dirname in dirnames: print 'parent is: '+ parent print 'dirname is' + dirname # output file information for filename in filenames: print 'parent is: '+ parent print 'filename is:' + filename # output file path information current Path = 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) # delete a file larger than 50 MB if filesize> 50: delete = raw_input ('Are you sure to delete? ') If delete = 'yes': OS. remove (currentPath)
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