return super(ParamValueInline,self).formfield_for_foreignkey(db_field,request,**kwargs)自己返回自己的父类

class A(object):
    def __init__(self):
        print(self.__class__.__mro__)
    
    def bark(self):
        print("I‘m A")
        super(A, self).bark()

class B(object):
    def bark(self):
        print("I‘m B")


class C(A, B):
    def bark(self):
        print("I‘m C")
        super(C, self).bark()


if __name__ == ‘__main__‘:
    c = C()
    c.bark()

(<class ‘__main__.C‘>, <class ‘__main__.A‘>, <class ‘__main__.B‘>, <class ‘objec
t‘>)
I‘m C
I‘m A
I‘m B