Flask 在 Debug 模式下初始化2次

请移步：

http://blog.zengrong.net/post/2632.html

https://stackoverflow.com/questions/9449101/how-to-stop-flask-from-initialising-twice-in-debug-mode/9476701#9476701

https://stackoverflow.com/questions/25504149/why-does-running-the-flask-dev-server-run-itself-twice/25504196#25504196

https://stackoverflow.com/questions/9449101/how-to-stop-flask-from-initialising-twice-in-debug-mode