Flask Hello World程序无效404找不到错误

时间:2018-01-04 01:37:45

标签: flask

我正在尝试使用Flask,并且我在hello world程序中收到404 Not Found错误。

我使用的程序:

from flask import Flask
app = Flask(__name__)

@app.route('/')
@app.route('/index.html')
def hello_world():
    return 'Hello, World'

if __name__== '__main__':
    app.run(host='localhost')

然后我跑

$export FLASK_APP = minimal.py
$flask run

返回:

* Serving Flask app "minimal"
* Forcing debug mode on
* Restarting with stat
* Debugger is active!
* Debugger PIN 127-804-808
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

当我访问http://localhost:5000http://127.0.0.1:5000时,我得到:

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

我的主机文件如下所示:

# localhost name resolution is handled within DNS itself.
#   127.0.0.1       localhost
#   ::1             localhost

任何想法都错了吗?谢谢

1 个答案:

答案 0 :(得分:0)

是的,你可以删除以下方式找不到的错误404: 1:你应该写命令netstat -a -b来检查哪个端口没有空闲或忙于做某事或 2:在您的代码中写入app.run(port = 4996)而不是app.run(),默认选择端口号。 50000