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

The NoneType is the type of the value None. In this case, the variable lifetime has a value of None.

A common way to have this happen is to call a function missing a return.

There are an infinite number of other ways to set a variable to None, however.

Answer 2

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

   <!-- <td>{{ qual.date_expiry.date() }}</td> -->

Delete the line or fix it up:

<td>{% if qual.date_attained != None %} {{ qual.date_attained.date() }} {% endif %} </td>

Answer 3

if we assign something like the below, it will throw error as "AttributeError: 'NoneType' object has no attribute 'show'"

df1=df.withColumn('newAge',df['Age']).show() 

Answer 4

You have a variable that is equal to None and you're attempting to access an attribute of it called 'something'.

foo = None
foo.something = 1

or

foo = None
print(foo.something)

Both will yield an AttributeError: 'NoneType'