note

If you get 'No module named 'psycopg'' in SQLAlchemy 2.1, add +psycopg2 to the URL—3 ways to fix it, and 9 SQL statements that will fail in psycopg 3 (measured in Docker)

The cause is that in SQLAlchemy 2.1.0, released on September 24, 2026, the default driver changed from psycopg2 to psycopg 3. Connection URLs can specify a driver in the form postgresql+drivername://, ...
note

[Introduction] Connecting User and Post with a one-to-many relationship using Flask-SQLAlchemy's back_populates — A blog API with Flask-Login

Everything is contained in a single file (app.py). I will present the entire code first and then examine it section by section in the following chapters. from flask import Flask, request, jsonify from ...
learn

PostgreSQL + pgvector

This repository makes it easy to deploy a PostgreSQL Flexible Server to Azure with the pgvector extension installed. The pgvector extension provides a vector similarity search engine for PostgreSQL, ...
blog.jetbrains.com

What’s Fixed and Improved in PyCharm 2026.2

Across the PyCharm 2026.2 release line, we shipped 263 fixes and improvements. Many improve Python code insight directly, with more precise type inference, fewer false positives, smarter completion ...
GitHub

fastapi-example

Practical Clean Architecture backend example built with FastAPI. No stateful globals (DI), low coupling (DIP), tactical DDD, CQRS, proper UoW usage. REST API, per ...
learn

Quickstart: Generate code

In this quickstart, you learn how GitHub Copilot accelerates SQL and object-relational mapping (ORM) development by generating context-aware code directly within Visual Studio Code. GitHub Copilot ...
databricks.com

How to use Lakebase as a transactional data layer for Databricks Apps

Build full-stack apps on Databricks using Lakebase for storage and Databricks Apps for the UI. Follow a real example: A holiday request tool that stores and updates data in Lakebase. Get step-by-step ...
blog.csdn

Python ORM神器：SQLAlchemy完全指南

本内容遵循CC 4.0 BY-SA版权协议 在Python开发中，数据库操作是不可避免的重要环节。直接使用原生SQL虽然灵活，但容易出错且维护困难。SQLAlchemy作为Python中最流行的ORM（对象关系映射）框架，为 ...
blog.csdn

python: SQLAlchemy (ORM) Simple example using SQLite

本内容遵循CC 4.0 BY-SA版权协议 领域层（Domain Laye）：定义了 School 实体类和 SchoolRepository 抽象基类，明确了业务实体和数据访问的契约。 基础设施层（Infrastructure Laye）：通过 SQLAlchemy 实现了 ...
habr

SQLAlchemy 2.0 для новичков

Данная статья представляет собой ознакомление с базовым синтаксисом SQLAlchemy 2.0, информации здесь хватит для того, чтобы сразу начать ...
KDnuggets

Developing End-to-End Data Science Pipelines with Data Ingestion, Processing, and Visualization

Data science projects are not about developing and not coming back to them. They involve a whole process, from acquiring the dataset to maintaining it. This iterative process ensures that the model ...