class vs instance attributes
for class
object, any variable defined inside constructor __init__
is the instance attributes, outside of it is called class
attribute, for example,
class MyClass
class_attr = None
def __init__(self,*args,**kwargs):
instance_attr = None
please have a look on this question: https://stackoverflow.com/questions/524714/does-python-have-class-prototypes-or-forward-declarations
To better understand their difference, https://dzone.com/articles/python-class-attributes-vs-instance-attributes
Be extremely aware of behind the scene mechanism, class attribute
s keep fixed only on immutable properties.