I am getting

__import__(module_name)
ValueError: source code string cannot contain null bytes

when trying to do flask run

I am creating the file like echo “import flask from Flask” >> app.py and edit file from there adding

import flask from Flask
app = Flask(__name__)

@app.route("/")
def hello_world():
    return "<p>Hello, World!</p>" ```

this app.py file created from cmd not working i have to re-create it using vscode then it works normally