'The requested URL was not found on the server'

Question

from flask import Flask
app = Flask(__name__)
@app.route('/hello')
def hello_world():
return "Hello world"
if __name__ == '__main__':
app.run(host='0.0.0.0',port=8000, debug=True)

单击 http://0.0.0.0:8000/链接时，它显示：

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

Answer 1

您定义的唯一URL是/hello，因此当您请求/时，没有任何要提供的服务，因此您会收到Not Found错误。您需要为/定义一些内容或改用http://0.0.0.0:8000/hello。例如，

@app.route('/')
def index_view():
return "hello from index"