In this type of inheritance, a class can inherit from a child class or derived class. Let's take a simple example code classmultilevel.py to understand:

class A():
  def sum1(self,a,b):
    c = a+b
    return c

class B(A):
  pass

class C(B):
  pass

c_obj = C()
print "Sum is ", c_obj.sum1(12,4)

In the preceding example, you can see that class B inherited from class A and class C inherited from class B. The instance of class C can call the method of class A. Let's see the output:

The preceding output shows that the code is running successfully.