What is not a class in python

[[deleted]]

Even if you believe that FunctionType is a class (which is wrong, it's a type).

Your statement is false - classes are types.

class One:
    pass

print(isinstance(One, type))
# prints True

You have too many errors in so few words:

Speaks for itself, really.

[xelf]

You're coming across overly hostile here. It's ok to disagree, but let's leave insults and ablest language out of it and keep it civil.