Redis-implementation-python

Implemetation of few redis commands like GET, SET, ZADD, ZRANGE etc using python sortedLists For any queries mail : [email protected]

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Basic Implementation details

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Implementation is in python3. To optimize the code and runtime for queries we have used built in python SortedContainers library. From that we use SortedSet for our implementation. Support for only the following commands from REDIS documentation:

1. GET
2. SET
3. EXPIRE
4. ZADD
5. ZRANGE
6. ZRANK

Installation

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Requirements

Python3
SortedConatainers

Installing SortedContainers:

pip3 install sortedcontainers

For more information on installation and implementation, please go through official SortedContainer documnetation.

Usage

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Basic implementation without threadings.

python3 redis.py

Server-Client mode (1 server, multiple clients)

python3 server.py			#From terminal 1
python3 client.py			#open a new terminal for a new client.
							#Donot use the same terminal where server runs

NOTE : The database used for storing information is not saved at multiple intervals. Rather we store it when exiting or starting of the code to reduce data writing overhead eachtime. Hence use Ctrl+C or Ctrl+D to exit.

Sample Commands:

"GET firstkey" 
"SET firstkey firstvalue"
"GET firstkey"
"EXPIRE firstkey 5"
"GET firstkey"
"SET secondkey secondvalue EX 2"
"GET secondkey"
"SET secondkey thirdvalue NX"
"GET secondkey"
"ZADD myzset 2 two 3 three"
"ZRANGE myzset 0 -1 WITHSCORES"
"ZRANK myzset three"
"ZRANGE myzset 0 1 WITHSCORES"
"ZADD thirdkey 1 one "
"ZADD thirdkey XX 4 one"
"ZADD thirdkey NX 5 one"
"ZADD thirdkey NX 6 one"
"ZADD thirdkey NX 6 two"
"ZADD thirdkey XX CH INCR 4 two"
"ZADD thirdkey NX CH INCR 4 two"

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