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A simple and fast read-only embedded key-value database

Project Description

ConstDB is a very simple and fast read-only embedded key-value database. Keys consist of 64-bit integers or strings and values consist of arbitrary byte strings.

Sample

import constdb

with constdb.create('db_name') as db:
    db.add(-2, b'7564')
    db.add(3, b'23')
    db.add(-1, b'66')

with constdb.read('db_name') as db:
    assert db.get(-2) == b'7564'
    assert db.get(-1) == b'66'
    assert db.get(3) == b'23'

Documenation

ConstDB contains only two functions: create and read.

create(filename) allows you to create a new ConstDB database. It takes a filename and returns a ConstDBWriter. A ConstDBWriter has two methods:

  • add(key, value): Adds a key-value pair to the database. The key must be a 64 bit integer or a string. The value must be a byte string.
  • close(): Finalize and close the database.

read(filename) allows you to read an existing ConstDB database. It takes a filename and returns a ConstDBReader. A ConstDBReader has two methods:

  • get(key): Get a value from the database. The key must be a 64 bit integer or a string. Returns the value if the key is in the database. Returns None if the key is not found.
  • close(): Finalize and close the database.

Requirements

The only requirement for ConstDB is Python 3.

Release history Release notifications

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3.3.0

This version
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3.2.0

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3.1.0

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3.0.0

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2.0.0

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1.0.2

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1.0.1

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1.0.0

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Filename, size & hash SHA256 hash help File type Python version Upload date
constdb-3.2.0.tar.gz (4.1 kB) Copy SHA256 hash SHA256 Source None Apr 17, 2018

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