asyncpgdb 0.0.21

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# asyncpgdb

`asyncpgdb` is a Python library that provides an asynchronous database interface built on top of `asyncpg`. One of its unique features is a custom query formatting style that allows you to write parameterized queries using a more readable syntax.

## Installation

You can install `asyncpgdb` using pip:

```bash
pip install asyncpgdb

Features

• Asynchronous database operations.
• Connection pooling for efficient resource management.
• Simplified query execution and result handling.
• Custom query formatting style for better readability.

Usage

Database Connection

To establish a connection to your PostgreSQL database, create an instance of the Database class:

from asyncpgdb import Database

db = Database(dsn="your_database_dsn_here")
await db.connect()

Executing Queries

You can execute queries using the execute method. The library supports a custom query formatting style that allows you to parameterize your queries using named variables, enclosed in $( ):

query = "SELECT name, age FROM users WHERE name = $(name) AND age > $(age)"
result = await db.execute(query, vars={"name": "John", "age": 30})

# For SELECT queries, you can fetch the results in various formats
rows = await result.fetch_all()

Connection Management

asyncpgdb provides automatic connection management, so you don't need to worry about acquiring and releasing connections manually:

async with db.acquire_connection() as conn:
    # Use the connection for queries within this block
    pass  # Connection is automatically released after this block

Connection Pool

asyncpgdb manages a connection pool by default, so you can specify the minimum and maximum number of connections in the pool when creating a Database instance:

db = Database(dsn="your_database_dsn_here", min_size=2, max_size=10)

Examples

Selecting Data

query = "SELECT name, age FROM users WHERE age > $(age)"
results = await db.execute(query, vars={"age": 30})
users = await results.fetch_all()

Inserting Data

query = "INSERT INTO products (name, price) VALUES ($(name), $(price))"
await db.execute(query, vars={"name": "Widget", "price": 19.99})

Updating Data

query = "UPDATE orders SET status = $(status) WHERE id = $(id)"
await db.execute(query, vars={"status": "shipped", "id": 123})

Documentation

For more details and advanced usage, refer to the documentation.

License

This library is licensed under the MIT License.

Please replace `"your_database_dsn_here"` with your actual database DSN, and ensure that you have the required dependencies installed to use `asyncpgdb`. You can find detailed documentation and usage examples in the official documentation.