How to run a flask application?

Question

I want to know the correct way to start a flask application. The docs show two different commands:

$ flask -a sampl         


        

Answer 1

Latest documentation has the following example assuming you want to run hello.py(using .py file extension is optional):

Unix, Linux, macOS, etc.:

$ export FLASK_APP=hello
$ flask run

Windows:

> set FLASK_APP=hello
> flask run