This repository

This is an intent to port CodernityDB to Python 3, from de [original source](http://labs.codernity.com/codernitydb), written for Python 2.x,

CodernityDB is opensource, pure python (no 3rd party dependency), fast (really fast check Speed in documentation if you don't believe in words), multiplatform, schema-less, NoSQL_ database. It has optional support for HTTP server version (CodernityDB-HTTP), and also Python client library (CodernityDB-PyClient) that aims to be 100% compatible with embeded version.

Although this port is a beta yet, it works in the basic usage cases.

Calling for help

Any help to port CodernityDB to Python 3 is wellcome. It's a hard works.

Feel free to clone the repo an send any patch.

Status

Following the official examples, I was able to determinate:

• Insert/Save: Works oks!
• Get query: Works oks!
• Duplicates: Works oks!
• Update/delete: Doesn't works yet.
• Ordered data: Doesn't works yet.

Ported examples

There he ported examples:

Insert/Save

from CodernityDB3.database import Database

def main():
    db = Database('/tmp/tut1')
    db.create()
    for x in range(100):
        print(db.insert(dict(x=x)))
    for curr in db.all('id'):
        print(curr)

main()

Get query

from CodernityDB3.database import Database
from CodernityDB3.hash_index import HashIndex


class WithXIndex(HashIndex):

    def __init__(self, *args, **kwargs):
        kwargs['key_format'] = 'I'
        super(WithXIndex, self).__init__(*args, **kwargs)

    def make_key_value(self, data):
        a_val = data.get("x")
        if a_val is not None:
            return a_val, None
        return None

    def make_key(self, key):
        return key


def main():
    db = Database('/tmp/tut2')
    db.create()
    x_ind = WithXIndex(db.path, 'x')
    db.add_index(x_ind)

    for x in range(100):
        db.insert(dict(x=x))

    for y in range(100):
        db.insert(dict(y=y))

    print(db.get('x', 10, with_doc=True))

if __name__ == '__main__':
    main()

Duplicates

from CodernityDB3.database import Database
from CodernityDB3.hash_index import HashIndex


class WithXIndex(HashIndex):

    def __init__(self, *args, **kwargs):
        kwargs['key_format'] = 'I'
        super(WithXIndex, self).__init__(*args, **kwargs)

    def make_key_value(self, data):
        a_val = data.get("x")
        if a_val is not None:
            return a_val, None
        return None

    def make_key(self, key):
        return key


def main():
    db = Database('/tmp/tut3')
    db.create()
    x_ind = WithXIndex(db.path, 'x')
    db.add_index(x_ind)

    for x in range(100):
        db.insert(dict(x=x))

    for x in range(100):
        db.insert(dict(x=x))

    for y in range(100):
        db.insert(dict(y=y))

    print(db.get('x', 10, with_doc=True))
    for curr in db.get_many('x', 10, limit=-1, with_doc=True):
        print(curr)

if __name__ == '__main__':
    main()

Update/delete

from CodernityDB3.database import Database
from CodernityDB3.tree_index import TreeBasedIndex


class WithXIndex(TreeBasedIndex):

    def __init__(self, *args, **kwargs):
        kwargs['node_capacity'] = 10
        kwargs['key_format'] = 'I'
        super(WithXIndex, self).__init__(*args, **kwargs)

    def make_key_value(self, data):
        t_val = data.get('x')
        if t_val is not None:
            return t_val, None
        return None

    def make_key(self, key):
        return key


def main():
    db = Database('/tmp/tut_update')
    db.create()
    x_ind = WithXIndex(db.path, 'x')
    db.add_index(x_ind)

    # full examples so we had to add first the data
    # the same code as in previous step

    for x in range(100):
        db.insert(dict(x=x))

    for y in range(100):
        db.insert(dict(y=y))

    # end of insert part

    print(db.count(db.all, 'x'))

    for curr in db.all('x', with_doc=True):
        doc = curr['doc']
        if curr['key'] % 7 == 0:
            db.delete(doc)
        elif curr['key'] % 5 == 0:
            doc['updated'] = True
            db.update(doc)

    print(db.count(db.all, 'x'))

    for curr in db.all('x', with_doc=True):
        print(curr)

if __name__ == '__main__':
    main()

Ordered

from CodernityDB3.database import Database
from CodernityDB3.tree_index import TreeBasedIndex


class WithXIndex(TreeBasedIndex):

    def __init__(self, *args, **kwargs):
        kwargs['node_capacity'] = 10
        kwargs['key_format'] = 'I'
        super(WithXXIndex, self).__init__(*args, **kwargs)

    def make_key_value(self, data):
        t_val = data.get('x')
        if t_val is not None:
            return t_val, data
        return None

    def make_key(self, key):
        return key


def main():
    db = Database('/tmp/tut4')
    db.create()
    x_ind = WithXIndex(db.path, 'x')
    db.add_index(x_ind)

    for x in range(11):
        db.insert(dict(x=x))

    for y in range(11):
        db.insert(dict(y=y))

    print(db.get('x', 10, with_doc=True))

    for curr in db.get_many('x', start=15, end=25, limit=-1, with_doc=True):
        print(curr)


if __name__ == '__main__':
    main()