flask之装饰器

from flask import Flask,render_template,redirect
app = Flask(__name__)

@app.before_request
def xx1():
    print("前1")

@app.before_request
def xx2():
    print("前2")

@app.after_request
def xx1(response):
    print("后1")
    return response

@app.after_request
def xx2(response):
    print("后2")
    return response

@app.route(‘/x1‘,methods=["GET","POST"])
def x1():
    print("视图函数x1")
    return "视图函数x1"

@app.route(‘/x2‘,methods=["GET","POST"])
def x2():
  print("视图函数x2")
  return "视图函数x2"

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