ASGI library ideal for building high performance asyncio services

 Starlette is a lightweight ASGI (Asynchronous Server Gateway Interface)
 framework/toolkit, which is ideal for building high performance asyncio
 services.
 .
 It is production-ready, and gives you the following:
 .
  * Seriously impressive performance.
  * WebSocket support.
  * In-process background tasks.
  * Startup and shutdown events.
  * Test client built on `httpx`.
  * CORS, GZip, Static Files, Streaming responses.
  * Session and Cookie support.
  * 100% test coverage.
  * 100% type annotated codebase.
  * Zero hard dependencies.
 .
 Example:
 .
  from starlette.applications import Starlette
  from starlette.responses import JSONResponse
  from starlette.routing import Route
 .
  async def homepage(request):
      return JSONResponse({'hello': 'world'})
 .
  app = Starlette(debug=True, routes=[
    Route('/', homepage),
  ])