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PyInMemStore

PyInMemStore is a lightweight, in-memory data store written in Python. It provides a simple way to store and manipulate data structures such as strings, lists, sets, and sorted sets. The store offers thread-safe operations and supports key expiry, similar to Redis.

Features

  • Basic data types: Strings, Lists, Sets, and Sorted Sets.
  • Thread-safe operations.
  • Key expiry functionality.
  • Dynamic method dispatching based on data type.
  • Easy extensibility for additional data types and operations.

How to install

pip install pyinmem

Data Types and Operations

String

  • set(key, value, ttl=None): Set a string value under a key. Optionally, specify a Time-To-Live (TTL) in seconds.
  • get(key): Retrieve the string value for a given key.

List

  • lpush(key, value): Push a value to the beginning of a list at a given key.
  • rpop(key): Pop a value from the end of a list at a given key.
  • llen(key): Get the length of the list at a given key.

Set

  • sadd(key, *values): Add one or more values to a set at a given key.
  • srem(key, *values): Remove one or more values from a set at a given key.
  • smembers(key): Get all the members of the set at a given key.
  • sis_member(key, value): Check if a value is a member of the set at a given key.

Sorted Set

  • zadd(key, scores): Add one or more member-score pairs to a sorted set at a given key.
  • zrange(key, start, stop): Get a range of members from a sorted set at a given key, sorted by score.
  • zscore(key, member): Get the score of a member in a sorted set at a given key.

Usage

from pyinmemstore import PyInMemStore

store = PyInMemStore(save_data=True)


store.set('hello', 'world')
print(store.get('hello'))


store.lpush('mylist', 'hello')
store.lpush('mylist', 'world')
print(store.rpop('mylist'))


store.sadd('myset', 'hello', 'world')
print(store.smembers('myset'))


store.zadd('my_sorted_set', {'Alice': 100, 'Bob': 90})
print(store.zrange('my_sorted_set', 0, -1))
print(store.zscore('my_sorted_set', 'Alice'))