bbelderbos

# gemini generated example based on comment above
import redis
from pydantic import Field, field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict
from sqlalchemy import create_engine, text


class Settings(BaseSettings):
    # --- 1. Basic Typed Settings (Fails fast if missing/invalid) ---
    OPENAI_API_KEY: str = Field(..., description="Required API key")

bbelderbos

from dataclasses import dataclass, field
from pathlib import Path
from typing import Callable, Protocol


@dataclass(frozen=True)
class Say:
    text: str

bbelderbos

from decimal import Decimal
from pydantic import BaseModel, ValidationError


class Expense(BaseModel):
    amount: Decimal


# coercion: each valid input becomes a Decimal
for v in [5, 5.50, "5.50", Decimal("5.50")]:

bbelderbos

# /// script
# requires-python = ">=3.12"
# dependencies = [
#   "python-telegram-bot>=21",
#   "openai>=1.40",
#   "httpx",
#   "python-decouple",
#   "pydantic",
# ]
# ///

bbelderbos

"""Single-file Pyodide exercise starter.

Run:
    python pyodide_starter.py

Writes index.html next to this file and serves it on http://localhost:8765.
Open the URL, hit "Run tests", and watch pytest run inside the browser
against a small stdlib Pybites Bite (anagrams). Edit the HTML to swap in
your own exercises.

bbelderbos

# /// script
# requires-python = ">=3.12"
# dependencies = [
#   "anthropic>=0.40",
#   "httpx>=0.27",
#   "openai>=1.50",
#   "python-decouple>=3.8",
# ]
# ///
# AI trend digest: fetch HN + Reddit concurrently, rank with an LLM, print markdown.

bbelderbos

"""
Finite State Machine — GitHub PR workflow
Full implementation + tests from: https://belderbos.dev/blog/build-finite-state-machine-python
Run: uvx pytest fsm.py -v
"""

import pytest


# --- Implementation ---

bbelderbos

import asyncio
import random

from datastar_py import ServerSentEventGenerator as SSE
from datastar_py.fastapi import DatastarResponse
from fastapi import FastAPI, Request
from fastapi.responses import HTMLResponse
from fastapi.templating import Jinja2Templates

app = FastAPI(title="Datastar Stock Ticker")

bbelderbos

# /// script
# dependencies = [
#   "python-decouple",
#   "requests",
# ]
# ///

import argparse
import json
import sys

bbelderbos

# 1) Literal patterns: Cleanly dispatch on exact values (great for status codes and enums).


def handle_response(status: int) -> str:
    match status:
        case 200:
            return "OK"
        case 404:
            return "Not Found"
        case 500: