python - flask 应用程序 : The requested URL was not found on the server

Question

为什么我的添加功能不起作用？

from flask import Flask
from flask import request
app = Flask(__name__)
@app.route('/')
@app.route('/<name>')
def index(name="Mona"):
    #name= request.args.get('name', name)
    return "Hello from {}".format(name)
@app.route('/add/num1/num2')
def add(num1, num2):
    return '{} + {} = {}'.format(num1, num2, num1 + num2)
app.run(debug=True, port=8002, host='0.0.0.0')

当我浏览到0.0.0.0:8002/add/1/4时收到此错误

Not Found

The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.

Answer 1

将添加方法更改为以下内容，现在它可以工作了:

@app.route('/add/<int:num1>/<int:num2>')
def add(num1, num2):
    return '{} + {} = {}'.format(num1, num2, num1 + num2)

更新:进一步说明，如果您不想在输入 float 时收到 404 错误，请使用以下代码:

@app.route('/add/<int:num1>/<int:num2>')
@app.route('/add/<int:num1>/<float:num2>')
@app.route('/add/<float:num1>/<int:num2>')
@app.route('/add/<float:num1>/<float:num2>')
def add(num1, num2):
    return '{} + {} = {}'.format(num1, num2, num1 + num2)