Python operation of the Redis string operation

# __author__ = ' STEVEN ' import redis,time# mode 1, Direct link operation # r = Redis. Redis (host= ' 192.168.43.22 ', port=6379) # r.set (' name ', ' Lisi ') # Print (R.get (' name '). Decode ()) # mode 2, create process Pool poll = Redis. ConnectionPool (host= ' 192.168.43.22 ', port=6379) #选择进程池r = Redis. Redis (Connection_pool=poll) # #set () implementation defines the string name, value, expiration time (ex[s],ps[ms],nx[true if there is a new],xx[true if it exists, overwriting him) # R.set (' Age ', ' ex=2 ', ' # print ' (R.get (' age '). Decode ()) # Time.sleep (2) # Print ((R.get ("age"). Decode ()) If R.get (' age ')! = None Else ' None ') # Nx[true if not present in the new], there is also no change # r.set (' name ', ' Lisi ', nx=true) # Print (R.get (' name ')) # Xx[true If it exists then overwrite him], does not exist nor new # R.set (' name ', ' Man ', Xx=true) # Print (R.get (' name ')) #setnx () if key already exists, return false# print (r.setnx (' name2 ', ' Huhu ')) # Print (R.get (' name2 ')) #setex () sets the value of the key corresponding to string, and specifies the validity period for this key value # R.setex (' Age1 ', ' Max ', ') # Print (R.get (' Age1 ')) # Time.sleep (+) # print (R.get (' Age1 ') # SETRANGE () sets the substring of the value of the specified key # r.set (' name ', ' Man ') # r.setrange (' name ', 1, ' e ') # Print (r.get (' name ')) # Mset () set multiple key values at once, successful return OK means all values are set, failed to return 0 means no value is set. # R.mset ({' mes1 ': ' Nihao ', ' mes2 ': ' Woyehao '}) # Print (R.mget ([' mes1 ', ' Mes2 ')) # MSETNX () Set the value of multiple keys at once, successful return OK means all values are set , a failure return of 0 means that no value is set, but the key that already exists is not overwritten. #都不存在时新建 # Print (r.msetnx ({' Mes11 ': ' Nihao ', ' mes21 ': ' Woyehao1 '}) # Print (R.mget ([' Mes11 ', ' Mes21 ')) # Getset () set key Value and returns the old value of key # print (R.getset (' Mes11 ', ' Nihaoma ')) # Print (R.get (' Mes11 ')) # GetRange () Gets the substring of the value of the specified key. # Print (R.getrange (' Mes11 ', 1,3)) # INCR () makes a Gaga operation on the value of key and returns the new value. Note INCR A value that is not int returns an error, incr a nonexistent key, setting key to # Print (R.INCR (' IDs ') # Incrby () is similar to INCR, plus the specified value, key does not exist when the key is set , and think that the original value is 0# print (R.incrby (' IDs ', 3)) # DECR () to the value of the key is a subtraction operation, decr a key does not exist, then set key to -1# print (R.DECR (' lib ')) # Appen D () Appends value to the string value of the specified key, returning the length of the new string value # print (R.append (' mes11 ', ' 123 ')) # Print (R.get (' Mes11 ')) # strlen () takes the length of the value of the specified key # r.set (' info ', ' 1234 ') # Print (R.strlen (' info '))

　　

Python operation of the Redis string operation