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.
Project details
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