![[PYTHON] No numeric types to aggregate [FIXED]](https://www.codingpanel.com/wp-content/uploads/2021/05/5848152fcef1014c0b5e4967-e1620929896729.png)
The exception or error message AttributeError: ‘NoneType’ object has no attribute ‘append’ shows up because there is an attempt to use the append attribute of the object, and this …
The exception or error message AttributeError: ‘NoneType’ object has no attribute ‘append’ shows up because there is an attempt to use the append attribute of the object, and this …