【说站】Python中concurrent.futures模块如何使用

import flask
import json
import time
from concurrent.futures import ThreadPoolExecutor   # 需安装
 
app = flask.Flask(__name__)
pool = ThreadPoolExecutor()
 
 
def read_file():
    time.sleep(0.1)
    return "file result"
 
 
def read_db():
    time.sleep(0.2)
    return "db result"
 
 
def read_api():
    time.sleep(0.3)
    return "api result"
 
 
@app.route("/")
def index():
    result_file = pool.submit(read_file)
    result_db = pool.submit(read_db)
    result_api = pool.submit(read_api)
 
    return json.dumps({
        "result_file": result_file.result(),
        "result_db": result_db.result(),
        "result_api": result_api.result(),
    })
 
 
if __name__ == "__main__":
app.run()