Question

I have a code (simplified):

class A(object):
    attrib1 = "a"
    attrib2 = "b"

class B(A):
    flag = True

in some place in my code, I have an instance of A, but I need to create an instance of class B, which will have all the data from instance of A… I feel myself stupid, but I don’t want to do something like:

class B(A):
    def __init__(self,a1,a2,a3,a4,..):
        self.a1 = a1
        self.a2 = a2

and call like:

obj_b = B( obj_a.a1, obj_a.a2,...)

Answer 1

class B(A):
    def __init__(self, obj):
        self.__dict__.update(obj.__dict__)