Root path Flask IDE

[vandelouw]

Hi,
I have a problem running an app built with Flask in PyCharm, but it is working correctly in the shell.
It seems to come from a root path, does anyone know how to fix it ?
Thanks,
Here is the code : the classical

#! /usr/bin/python
# -*- coding:utf-8 -*-
 
from flask import Flask
import os
app = Flask(__name__)
 
@app.route('/')
def index():
    return "Hello !"
 
if __name__ == '__main__':
    app.run(debug=True)