使用Python Web框架開發高效能應用的關鍵技巧

from flask import Flask, request

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run()

import redis

# 初始化Redis连接
r = redis.Redis(host='localhost', port=6379, db=0)

# 检查缓存是否存在
def get_data_from_cache(key):
    if r.exists(key):
        return r.get(key)
    else:
        data = get_data_from_database(key)
        r.set(key, data)
        return data

# 从数据库中获取数据
def get_data_from_database(key):
    # 从数据库查询数据的逻辑
    pass

import tornado.ioloop
import tornado.web
from tornado.httpclient import AsyncHTTPClient

class MainHandler(tornado.web.RequestHandler):
    async def get(self):
        http_client = AsyncHTTPClient()
        response = await http_client.fetch("http://www.example.com")
        self.write(response.body)

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

import mysql.connector
from mysql.connector import pooling

# 初始化数据库连接池
dbconfig = {
    "database": "mydb",
    "user":     "user",
    "password": "password",
    "host":     "localhost",
}

cnxpool = mysql.connector.pooling.MySQLConnectionPool(pool_name="my_pool", pool_size=10, **dbconfig)

# 从连接池获取数据库连接
def get_conn_from_pool():
    return cnxpool.get_connection()

# 执行数据库查询
def query_from_database(sql):
    conn = get_conn_from_pool()
    cursor = conn.cursor()
    cursor.execute(sql)
    results = cursor.fetchall()
    cursor.close()
    conn.close()
    return results