pyql-db 0.4

Simple python database orchestration utility which makes it easy to add tables, insert, select, update, delete items with tables

pyql

Simple python database orchestration utility which makes it easy to add tables, insert, select, update, delete items with tables

Instalation

$ python3 -m venv myproj

$ source my-project/bin/activate

Install with PIP

 (myproj)$ pip install pyql-db   

Download & install Library from Github:

(myproj)$ git clone https://github.com/codemation/pyql.git

Use install script to install the pyql into the activated environment libraries

(myproj)$ cd pyql; sudo ./install.py install

Compatable Databases - Currently

• mysql
• sqlite

Getting Started

Note Some differences may apply for column options i.e AUTOINCREMENT(sqlite) vs AUTO_INCREMENT(mysql) See DB documentation for reference.

DB connection

    import sqlite3
    db = database(
        sqlite3.connect, 
        database="testdb"
        )

    import mysql.connector

    db = database(
        mysql.connector.connect,
        database='mysql_database',
        user='mysqluser',
        password='my-secret-pw',
        host='localhost',
        type='mysql'
        )

Table Create

Requires List of at least 2 item tuples, max 3 ('column name', str|int|float|byte, None|AUTO_INCREMENT|NOT NULL|OTHERS(not listed)

    db.create_table(
        'stocks', 
        [    
            ('order_num', int, 'AUTO_INCREMENT'),
            ('date', str),
            ('trans', str),
            ('symbol', str),
            ('qty', float),
            ('price', str)
        ], 
        'order_num' # Primary Key 
    )

Result:

    mysql> describe stocks;
    +-----------+---------+------+-----+---------+----------------+
    | Field     | Type    | Null | Key | Default | Extra          |
    +-----------+---------+------+-----+---------+----------------+
    | order_num | int(11) | NO   | PRI | NULL    | auto_increment |
    | date      | text    | YES  |     | NULL    |                |
    | trans     | text    | YES  |     | NULL    |                |
    | symbol    | text    | YES  |     | NULL    |                |
    | qty       | double  | YES  |     | NULL    |                |
    | price     | text    | YES  |     | NULL    |                |
    +-----------+---------+------+-----+---------+----------------+
    6 rows in set (0.00 sec)

Insert Data

Requires key-value pairs - may be input using dict or the following

    trade = {'date': '2006-01-05', 'trans': 'BUY', 'symbol': 'RHAT', 'qty': 100.0, 'price': 35.14}
    db.tables['stocks'].insert(**trade)


    db.tables['stocks'].insert(
        date='2006-01-05', # Note order_num was not required as auto_increment was specified
        trans='BUY',
        symbol='RHAT',
        qty=100.0,
        price=35.14
    )

Select Data

    sel = db.tables['stocks'].select('*', where=('symbol','RHAT'))
    print(sel)

Result:

    [{'order_num': 1, 'date': '2006-01-05', 'trans': 'BUY', 'symbol': 'RHAT', 'qty': 100.0, 'price': '35.14'}]

Update Data

    db.tables['stocks'].update(symbol='NTAP',trans='SELL', where=('order_num', 1))
    sel = db.tables['stocks'].select('*', where=('order_num', 1))

Result:

db.tables['stocks'].update(symbol='NTAP',trans='SELL', where={'order_num': 1})
sel = db.tables['stocks'].select('*', where={'order_num': 1})

Result:

    [{'order_num': 1, 'date': '2006-01-05', 'trans': 'SELL', 'symbol': 'NTAP', 'qty': 100.0, 'price': '35.14'}]

Delete Data

db.tables['stocks'].delete(where={'order_num': 1})