你可以将一些异步功能整合到Flask应用中，而不必完全将其转换为异步。
import asynciofrom flask import Flaskasync def abar(a): print(a)loop = asyncio.get_event_loop()app = Flask(__name__)@app.route("/")def notify(): loop.run_until_complete(abar("abar")) return "OK"if __name__ == "__main__": app.run(debug=False, use_reloader=False)这将阻止Flask响应，直到异步函数返回为止，但是它仍然允许你做一些聪明的事情。我已经使用此模式使用aiohttp并行执行许多外部请求，然后在完成它们之后，我回到传统的flask中进行数据处理和模板渲染。
import aiohttpimport asyncioimport async_timeoutfrom flask import Flaskloop = asyncio.get_event_loop()app = Flask(__name__)async def fetch(url): async with aiohttp.ClientSession() as session, async_timeout.timeout(10): async with session.get(url) as response: return await response.text()def fight(responses): return "Why can't we all just get along?"@app.route("/")def index(): # perform multiple async requests concurrently responses = loop.run_until_complete(asyncio.gather( fetch("https://google.com/"), fetch("https://bing.com/"), fetch("https://duckduckgo.com"), fetch("http://www.dogpile.com"), )) # do something with the results return fight(responses)if __name__ == "__main__": app.run(debug=False, use_reloader=False)
