why am i not able to run flask from cmd code example

Example 1: run flask app from script

# I am assuming that you have configured the app name as "app"

if __name__ == "__main__":
    app.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()