python - How to check if a variable's type is primitive?

Question

I don't know how to check if a variable is primitive. In Java it's like this:

if var.isPrimitive():

Answer 1

Since there are no primitive types in Python, you yourself must define what you consider primitive:

primitive = (int, str, bool, ...)

def is_primitive(thing):
    return isinstance(thing, primitive)

But then, do you consider this primitive, too:

class MyStr(str):
    ...

?

If not, you could do this:

def is_primitive(thing):
    return type(thing) in primitive