Flask是使用c視一個(gè)輕量級的Python Web框架，它允許開(kāi)發(fā)者快速地構建We??b應用程序，圖需在Flask中，安裝視圖函數是外功處理用戶(hù)請求并返回響應的核心部分，為了提高性能，使用c視Flask提供了異步視圖功能，圖需允許開(kāi)發(fā)者使用異步I/O操作來(lái)處理請求和響應。安裝
（圖片來(lái)源網(wǎng)絡(luò )，外功侵刪）要使用異步視(╬?益?)圖(tu)功能，使用c視首先需要安裝帶有async額外功能的圖需Flask，以下是安裝詳細的技術(shù)教學(xué)：
1、安裝Flask
在開(kāi)始之??前，外功確保?已經(jīng)安裝了Python，使用c視使用piヾ(′?｀)?p命令安裝Flask：
pip install Flask2、圖需安裝支持異步的安裝Fla(//ω//)sk擴展
為了使用異步視圖功能，需要安裝支持異步的Flask擴展，可以(yi)使用以下命令安裝：
pip install FlaskSocketIO
3、創(chuàng )建(jian)一個(gè)簡(jiǎn)單的Flask應用
創(chuàng )建一個(gè)名為app.py的文件，并在其中編寫(xiě)以下代碼：
from flask import Flask, render_templateimport asyncioapp = Flask(__name__)@app.route('/')def index(): return render_template('index.html')if __name__ == '__main__': app.run??(debug=True)4、創(chuàng )建一個(gè)簡(jiǎn)ヽ(′?｀)ノ單的HTML模板
在與app.py相同(°ロ°) !的目錄下，創(chuàng )建一個(gè)名為templates的文件夾，在templates文件夾中，創(chuàng )建一個(gè)名為index.html的文件，并編寫(xiě)以下代碼：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF8"> <meta name="viewport" content="width=devicewidth, initialscale=1.0"> <title>(???)Async Flask App<(?Д?)/title>&┐(′?｀)┌l(fā)t;/head><body> <h1>Hello, World!</h1??></body>&l(?Д?)t;/html>5、添加異步視圖函數
在app.py中，添加一個(gè)異步視圖函數，如下所示：
import asynciofrom flask import Flask, render_template, jsonify, request, make_responseimport randomimport timefrom flask_socket(′?｀)io import SocketIO, emit, join_room, leave_room, close_room, rooms, disconnect, send, eventlet, gevent, ssl_context, accept_web(′?ω?`)socket, session, namespace, flash, redirect???, url_for, send_from_dire???ctory, after_request,(′▽?zhuān)? get_flashed_messages, make_response as(′▽?zhuān)? res, stream_wi??th_context, current_app as app, Resp(′?｀)onseStreamerContextManager, stream_with_context, request as req, session as sess, url_for as u, escape as e, Markup as mk, render_template as rpt, jsonify as jfy, make_response as mkrsp, flash as flsh, redirect as redrct, get_flashed_me??ssages as gflsh, ResponseStreamerContextManager as rsccmgr, stream_with_context as stmcwc, request as rqst, session as ssn, url_for as urlf, escape as escp, Markup as mkup, render_template as rptr(???)tmpl, jsonify as jfynl(°□°), make_resヽ(′▽?zhuān)?ノponse as mkrsprsp, flash as flshn, redirect as redrctn, get_flashed_messages as gflshn, ResponseStreamerContextManager as rsccmgrn, stream_with_context as stmcwcnl: from flask import Flask, render_template, jsonify, req??uest, make_response import random import time from flask_socketio import SocketIO, emit, join_room, le( ?° ?? ?°)ave_room, cl(′?ω?`)ose_room, room(╯°□°）╯s, disconnect, send, eventlet, gevent, ssl_context, accept_websocket, session, namespace, flash, redヾ(?■_■)ノirect, url_fo??r, send??_from_directory, after_request, get_flashed_messages, make_response as res, stream_with_?context, current_app as app, ResponseS(???)treamerContextManager, strea?m_with_???context, request as req, session as sess, url_for as u, escape as e, Markup as mk, render_template as rpt, jsonify as jfy, make_response as?? mkrsp, flash as flsh, redirect as redrct, get_flashed_messages as gflsh, ResponseStreamerContextManager as rsccmgrn: async def async_view(): return "ヽ(′▽?zhuān)?ノHello from async view!"
6、將(jiang)異步視圖函數添加到路由中
在appヽ(′ー｀)ノ.py中，將異步視圖函數添加到路由中，如下所示：
@app.route('/async')async def async_view(): return "Hello from async view!"??;ヽ(′▽?zhuān)?ノ7、運行Flask應用
在命令行中，運行(′?ω?`)以下命令啟動(dòng)Flask應用：
python app.py
