FastAPI framework, high perf, easy to learn, fast to code, ready for production(fastapi.tiangolo.com)

    from typing import Optional
    
    from fastapi import FastAPI from pydantic import BaseModel
    
    app = FastAPI()
    
    class Item(BaseModel): 
      name: str 
      price: float 
      is_offer: Optional[bool] = None
    
    @app.get("/") 
    def read_root(): 
      return {"Hello": "World"}
    
    @app.get("/items/{item_id}") 
    def read_item(item_id: int, q: Optional[str] = None): 
      return {"item_id": item_id, "q": q}
    
    @app.put("/items/{item_id}") 
    def update_item(item_id: int, item: Item): 
      return {"item_name": item.name, "item_id": item_id}