Python: use set union | and recursive function and call aclass.__bases__ to def a function def bases(aclass):

it should return the result of a set as picture below

4. (4 pts) We learned that when we declare a class using inheritance, the bases attribute of the class is bound to a tuple of references to its base classes. Write a recursive function named bases that takes a reference to any class and returns a set containing that class and all its base classes (back to object). You may not use the mrO or mro attributes of the class, which would trivialize your function. You may use both iteration (over the bases list) and recursion. For example, given the following class definitions in a Script class F: pass Calling bases (A) returns the set class C :pass class G:pass class main .A