class ObjectA(object):
    '''Might have a parent and might have an array of children'''
    def __init__(self, parent=None):
        self.children = []
        if parent:
            parent.add_child(self)
        self.parent = parent

    def is_parent(self):
        if self.children:
            return True
        else:
            return False

    def add_child(self, child):
        self.children.append(child)
        child.parent = self

    def get_parent_array(self):
        if self.parent:
            return self.parent.children
        else:
            return None


if __name__ == "__main__":
    p = ObjectA()
    c1 = ObjectA(parent=p)
    c2 = ObjectA(parent=p)
    c3 = ObjectA(parent=p)

    print(p.children)