Flask-script running in server.py but not in init.py in same directory

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Apache

Python

Ubuntu

flask

if i run this code:

from flask import render_template
import connexion

# Create the application instance
app = connexion.App(__name__, specification_dir='./')

# Read the swagger.yml file to configure the endpoints
app.add_api('swagger.yml')

# Create a URL route in our application for "/"
@app.route('/')
def home():
    """
    This function just responds to the browser ULR
    localhost:80/home
    :return:        the rendered template 'home.html'
    """
    return render_template('home.html')

# If we're running in stand alone mode, run the application
if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, debug=True)

In file server.py everthing is working fine.

I now added # to the following code:

#if __name__ == '__main__':
#    app.run(host='0.0.0.0', port=5000, debug=True)

I imported this script from server.py to init.py because i want to run this code on apache2!

If I run the code with a apache2-restart the server says: Internal Server Error

Has anyone an idea? The code is working fine if i start the server.py by terminal but if i put the code to the init.py it isnt working anymore...

What I have tried:

I tryed to change file name but it doesnt work!!!