Flask app.py providing no output or log when running

Question

I am learning flask for first time i ran this program on my virtualenv and on my system but getting similar ouput which is nothing on the console.

Code:

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

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

Output:

Answer 1

I believe you need to indent your last line, app.run() . This is because you only want it to run when the __name__ is equal to '__main__' . You should then be able to run the program by exporting it and running it with the flask run command. Here is a more detailed explanation.