缺点：不好确定函数对应的url地址
一、示例代码
run.py
from flask import Flask
from controllers.index import index
from controllers.register import register
from controllers.login import login
app = Flask(__name__)
app.route("/")(index)
app.route("/register")(register)
app.route("/login")(login)
if __name__ == "__main__":
app.run(debug=True)controllers
login.py
def login():
return "login page"
