This is the Python interface to the Redis key-value store.
>>> import redis
>>> r = redis.Redis(host='localhost', port=6379, db=0)
>>> r.set('foo', 'bar') # or r['foo'] = 'bar'
True
>>> r.get('foo') # or r['foo']
'bar'
For a complete list of commands, check out the list of Redis commands here: http://redis.io/commands
$ sudo pip install redis
alternatively:
$ sudo easy_install redis
From sources:
$ sudo python setup.py install
redis-py is versioned after Redis. So, for example, redis-py 2.0.0 should support all the commands available in Redis 2.0.0.
Appends the string value to the value at key. If key doesn't already exist, create it with a value of value. Returns the new length of the value at key.
Tell the Redis server to rewrite the AOF file from data in memory.
Tell the Redis server to save its data to disk. Unlike save(), this method is asynchronous and returns immediately.
LPOP a value off of the first non-empty list named in the keys list.
If none of the lists in keys has a value to LPOP, then block for timeout seconds, or until a value gets pushed on to one of the lists.
If timeout is 0, then block indefinitely.
RPOP a value off of the first non-empty list named in the keys list.
If none of the lists in keys has a value to LPOP, then block for timeout seconds, or until a value gets pushed on to one of the lists.
If timeout is 0, then block indefinitely.
Returns the number of keys in the current database
Decrements the value of key by amount. If no key exists, the value will be initialized as 0 - amount
Delete one or more keys specified by names
Encode value using the instance's charset
Sends the command to the redis server and returns it's response
Returns a boolean indicating whether key name exists
Set an expire flag on key name for time seconds
Set an expire flag on key name. when can be represented as an integer indicating unix time or a Python datetime object.
Delete all keys in all databases on the current host
Delete all keys in the current database
Return the value at key name, or None of the key doesn't exist
Returns a connection object
Set the value at key name to value if key doesn't exist Return the value at key name atomically
Delete key from hash name
Returns a boolean indicating if key exists within hash name
Return the value of key within the hash name
Return a Python dict of the hash's name/value pairs
Increment the value of key in hash name by amount
Return the list of keys within hash name
Return the number of elements in hash name
Returns a list of values ordered identically to keys
Sets each key in the mapping dict to its corresponding value in the hash name
Set key to value within hash name Returns 1 if HSET created a new field, otherwise 0
Set key to value within hash name if key does not exist. Returns 1 if HSETNX created a field, otherwise 0.
Return the list of values within hash name
Increments the value of key by amount. If no key exists, the value will be initialized as amount
Returns a dictionary containing information about the Redis server
Returns a list of keys matching pattern
Return a Python datetime object representing the last time the Redis database was saved to disk
Return the item from list name at position index
Negative indexes are supported and will return an item at the end of the list
Listen for messages on channels this client has been subscribed to
Return the length of the list name
###lock(self, name, timeout=None, sleep=0.10000000000000001) Return a new Lock object using key name that mimics the behavior of threading.Lock.
If specified, timeout indicates a maximum life for the lock. By default, it will remain locked until release() is called.
sleep indicates the amount of time to sleep per loop iteration when the lock is in blocking mode and another client is currently holding the lock.
Remove and return the first item of the list name
Push value onto the head of the list name
Return a slice of the list name between position start and end
start and end can be negative numbers just like Python slicing notation
Remove the first num occurrences of value from list name
If num is 0, then all occurrences will be removed
Set position of list name to value
Trim the list name, removing all values not within the slice between start and end
start and end can be negative numbers just like Python slicing notation
Returns a list of values ordered identically to keys
- Passing *args to this method has been deprecated *
Moves the key name to a different Redis database db
Sets each key in the mapping dict to its corresponding value
Sets each key in the mapping dict to its corresponding value if none of the keys are already set
Parses a response from the Redis server
Ping the Redis server
Return a new pipeline object that can queue multiple commands for later execution. transaction indicates whether all commands should be executed atomically. Apart from multiple atomic operations, pipelines are useful for batch loading of data as they reduce the number of back and forth network operations between client and server.
Pop and return the first or last element of list name
This method has been deprecated, use Redis.lpop or Redis.rpop instead.
Subscribe to all channels matching any pattern in patterns
Publish message on channel. Returns the number of subscribers the message was delivered to.
Unsubscribe from any channel matching any pattern in patterns. If empty, unsubscribe from all channels.
Push value onto list name.
This method has been deprecated, use Redis.lpush or Redis.rpush instead.
Returns the name of a random key
Rename key src to dst
- The following flags have been deprecated * If preserve is True, rename the key only if the destination name doesn't already exist
Rename key src to dst if dst doesn't already exist
Remove and return the last item of the list name
RPOP a value off of the src list and atomically LPUSH it on to the dst list. Returns the value.
Push value onto the tail of the list name
Add value to set name
Tell the Redis server to save its data to disk, blocking until the save is complete
Return the number of elements in set name
Return the difference of sets specified by keys
Store the difference of sets specified by keys into a new set named dest. Returns the number of keys in the new set.
Switch to a different Redis connection.
If the host and port aren't provided and there's an existing connection, use the existing connection's host and port instead.
Note this method actually replaces the underlying connection object prior to issuing the SELECT command. This makes sure we protect the thread-safe connections
Set the value at key name to value
- The following flags have been deprecated * If preserve is True, set the value only if key doesn't already exist If getset is True, set the value only if key doesn't already exist and return the resulting value of key
Set the value of key name to value that expires in time seconds
Set the value of key name to value if key doesn't exist
Return the intersection of sets specified by keys
Store the intersection of sets specified by keys into a new set named dest. Returns the number of keys in the new set.
Return a boolean indicating if value is a member of set name
Return all members of the set name
Move value from set src to set dst atomically
Sort and return the list, set or sorted set at name.
start and num allow for paging through the sorted data
by allows using an external key to weight and sort the items. Use an "*" to indicate where in the key the item value is located
get allows for returning items from external keys rather than the sorted data itself. Use an "*" to indicate where int he key the item value is located
desc allows for reversing the sort
alpha allows for sorting lexicographically rather than numerically
store allows for storing the result of the sort into the key store
Remove and return a random member of set name
Return a random member of set name
Remove value from set name
Subscribe to channels, waiting for messages to be published
Return a substring of the string at key name. start and end are 0-based integers specifying the portion of the string to return.
Return the union of sets specifiued by keys
Store the union of sets specified by keys into a new set named dest. Returns the number of keys in the new set.
Returns the number of seconds until the key name will expire
Returns the type of key name
Unsubscribe from channels. If empty, unsubscribe from all channels
Watches the value at key name.
Add member value with score score to sorted set name
Return the number of elements in the sorted set name
This has been deprecated, use zincrby instead
Increment the score of value in sorted set name by amount
###zinterstore(self, dest, keys, aggregate=None) Intersect multiple sorted sets specified by keys into a new sorted set, dest. Scores in the destination will be aggregated based on the aggregate, or SUM if none is provided.
Return a range of values from sorted set name between start and end sorted in ascending order.
start and end can be negative, indicating the end of the range.
desc indicates to sort in descending order.
withscores indicates to return the scores along with the values. The return type is a list of (value, score) pairs
Return a range of values from the sorted set name with scores between min and max.
If start and num are specified, then return a slice of the range.
withscores indicates to return the scores along with the values. The return type is a list of (value, score) pairs
Returns a 0-based value indicating the rank of value in sorted set name
Remove member value from sorted set name
Remove all elements in the sorted set name with ranks between min and max. Values are 0-based, ordered from smallest score to largest. Values can be negative indicating the highest scores. Returns the number of elements removed
Remove all elements in the sorted set name with scores between min and max. Returns the number of elements removed.
Return a range of values from sorted set name between start and num sorted in descending order.
start and num can be negative, indicating the end of the range.
withscores indicates to return the scores along with the values as a dictionary of value => score
Returns a 0-based value indicating the descending rank of value in sorted set name
Return the score of element value in sorted set name
Union multiple sorted sets specified by keys into a new sorted set, dest. Scores in the destination will be aggregated based on the aggregate, or SUM if none is provided.
redis-py is developed and maintained by Andy McCurdy (sedrik@gmail.com). It can be found here: http://github.com/andymccurdy/redis-py
Special thanks to:
- Ludovico Magnocavallo, author of the original Python Redis client, from which some of the socket code is still used.
- Alexander Solovyov for ideas on the generic response callback system.
- Paul Hubbard for initial packaging support.