Why do I get AttributeError: 'NoneType' object has no attribute 'something'?

Question

I keep getting an error that says

AttributeError: \'NoneType\' object has no attribute \'something\'

Answer 1

You can get this error with you have commented out HTML in a Flask application. Here the value for qual.date_expiry is None:

Delete the line or fix it up:

{% if qual.date_attained != None %} {{ qual.date_attained.date() }} {% endif %}