Shelf DB

Introduction

Shelf DB is a tiny document database for Python to stores documents or JSON-like data.

Get it

$ pip install shelfdb shelfquery

Start asyncio server

$ shelfdb
Serving on ('127.0.0.1', 17000)
Database : db
pid : 12359

uvloop built-in already to make it faster. See uvloop.

Sync/Async query client through network.

import shelfquery

# Sync client point to 127.0.0.1:17000
db = shelfquery.db()

# Make it async client
db.asyncio()

# Make it sync client again
db.sync()

Store data

db.shelf('note').insert({
    'title': 'Shelf DB',
    'content': 'Simple note',
    'datetime': datetime.utcnow()})

Flexible query API with similar syntax

db.shelf('note')\
    .filter(lambda note:
        note['title'] == 'Shelf DB')\
    .sort(key=lambda note: note['datetime'])
    .run()

No need to learn more syntax. Let's just query using filter, slice, sort, map, reduce which almost the same to Python built-in functions.

Regular expression

Python reqular expression re can be use inside query function

import re
db.shelf('note')\
    .filter(lambda note:
        re.match(r'.*DB$', note['title']))\
    .run()

Tiny

Runtime code is small, easy to install. Shelf DB also works on Raspberry Pi.