jsonlite 0.0.3

A lightweight local JSON database

JSONLite

JSONLite is a lightweight, local JSON database for simple data storage.

Installation

pip install jsonlite

Data Layout

{
    "data": [
        {   "_id": 1,
            "name": "Alice",
            "age": 30
        },
        {   "_id": 2,
            "name": "Bob",
            "age": 25
        },
        {   "_id": 3,
            "name": "Charlie",
            "age": 20
        }
    ]
}

Usage

from jsonlite import Jsonlite

db = Jsonlite('db.json')

# insert
db.insert_one({'name': 'Alice', 'age': 30})
db.insert_one({'name': 'Bob', 'age': 25})
db.insert_many([
    {'name': 'Charlie', 'age': 20},
    {'name': 'Tom', 'age': 15}])

# find
all_records = db.find()
one_record = db.find_one()
age_over_20 = db.find({'age': (gt, 20)})

# update
db.update_one({'name': 'Alice'}, {'age': 31})
_id = db.find_one({'name': 'Alice'})['_id']
db.update_one({'_id': _id}, {'age': 35})

# delete
db.delete_one({'name': 'Bob'})
db.delete_many({'name': 'Bob'})

# complex find
records_with_name_alice_or_age_30 = db.find({'or': [
                                                    {'name': 'Alice'},
                                                    {'age': 30}]
                                                })

records_with_name_alice_and_age_30 = db.find({'and': [
                                                    {'name': 'Alice'},
                                                    {'age': 30}
                                                ]})

# custom functions in conditions
def is_even(value):
    return value % 2 == 0

records_with_even_age = db.find({'age': is_even})

def is_multiple_of(value, match_value):
    return value % match_value == 0

records_with_age_multiple_of_5 = db.find({'age': (is_multiple_of, 5)})

def is_between(value, min_value, max_value):
    return min_value < value < max_value

records_between_10_and_30 = self.db.find({'age': (is_between, 10, 30)})