@app.route('/')
def home():return render_template("homepage.html")#homepage.html在templates文件夹下

root = os.path.join(os.path.dirname(os.path.abspath(__file__)), "html")#html是个文件夹@app.route('/')
def home():return send_from_directory(root, "homepage.html")#homepage.html在html文件夹下

app = Flask(__name__,static_url_path='')#修改静态文件夹的目录@app.route('/')
def home():return app.send_static_file('homepage.html')#homepage.html在static文件夹下

app = Flask(__name__,static_url_path='') @app.route('/') def home(): return app.send_static_file('html/homepage.html')

 <link rel="stylesheet" type="text/css" href="../css/homepagestyle.css">#html里面引用css

# encoding=utf-8
from flask import Flask
from flask import g
import randomapp = Flask(__name__)@app.before_request
def set_on_g_object():x = random.randint(0,9)app.logger.debug('before request g.x is {x}'.format(x=x))g.x = x@app.route("/")
def test():g.x=1000return str(g.x)@app.after_request
def get_on_g_object(response):app.logger.debug('after request g.x is{g.x}'.format(g=g))return response

# encoding=utf-8
from flask import Flask
from flask import g
from flask import send_from_directory
from flask import url_for
import randomapp = Flask(__name__)@app.route("/")
def test():return "url创建方式一"def hello():return "url创建方式二"app.add_url_rule("/index/",endpoint="hello",view_func=hello)@app.route('/url1')
def Create_url1():return url_for('static',filename="style.css")app.add_url_rule('/attachment/<path:filename>',endpoint='attachment',build_only=True)
@app.route('/url2')
def Create_url2():return url_for('attachment',filename="upload.txt")

# encoding=utf-8
from flask import Flask
from flask import g
from flask import send_from_directory
from flask import url_for
import os.pathapp = Flask(__name__)
dirpath = os.path.join(app.root_path,'upload')
@app.route("/download/<path:filename>")
def downloader(filename):return send_from_directory(dirpath,filename,as_attachment=True)

# encoding=utf-8
from flask import Flask
from flask import g
from flask import send_from_directory
from flask import url_for
import os.pathapp = Flask(__name__,static_url_path="/test")@app.route("/")
def static_create():return url_for('static',filename='style.css')