how to change command line directory to flask-server code example

Example 1: how to set and run flask app on terminal

> set FLASK_APP=hello
> flask run

Example 2: flask commands

# manage.py

from flask_script import Manager

from myapp import app

manager = Manager(app)

@manager.command
def hello():
    print "hello"

if __name__ == "__main__":
    manager.run()