pydapper

A pure python library inspired by the NuGet library dapper.

pydapper is built on top of the dbapi 2.0 spec to provide more convenient methods for working with databases in python, with both sync and async dbapi support.

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Help

See the documentation for more details and examples for configuring all of the connectors pydapper supports.

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Installation

It is recommended to only install the database apis you need for your use case. Example below is for psycopg2!

pip

pip install pydapper[psycopg2]

poetry

poetry add pydapper -E psycopg2

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Supported drivers

The database support docs go into further detail about how to connect to the different drivers pydapper supports.

In addition to psycopg2, pydapper also supports.

Sync dbapis

• pymssql
• mysql-connector-python
• oracledb
• google-cloud-bigquery
• sqlite3
• psycopg

Async dbapis

• aiopg
• psycopg

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Never write this again...

from psycopg2 import connect

@dataclass
class Task:
    id: int
    description: str
    due_date: datetime.date

with connect("postgresql://pydapper:pydapper@localhost/pydapper") as conn:
    with conn.cursor() as cursor:
        cursor.execute("select id, description, due_date from task")
        headers = [i[0] for i in cursor.description]
        data = cursor.fetchall()

list_data = [Task(**dict(zip(headers, row))) for row in data]

Instead, write...

from dataclasses import dataclass
import datetime

import pydapper


@dataclass
class Task:
    id: int
    description: str
    due_date: datetime.date

    
with pydapper.connect("postgresql+psycopg2://pydapper:pydapper@locahost/pydapper") as commands:
    tasks = commands.query("select id, description, due_date from task;", model=Task)

(This script is complete, it should run "as is")

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