unsupported operand type(s) for +: 'int' and 'NoneType'

This error occurs when you try to perform an operation that is not supported between an integer value and a NoneType object.

For example, if you have a variable that is assigned a value of None and you try to add it to an integer, you will get the "unsupported operand type(s) for +: 'int' and 'NoneType'" error.

To resolve this error, make sure that all variables involved in the operation have the correct data type and are not None. You can use conditional statements or type checking functions to ensure that your code handles these situations correctly.