📘 Lesson  ·  Lesson 87

Multiple Inheritance & MRO

Multiple Inheritance

💡 At a Glance

Unlike Java, Python allows a class to inherit from multiple parents. The MRO (Method Resolution Order) decides which parent's method runs first.

Example

Python
class A:
    def show(self): print("A")
class B(A):
    def show(self): print("B")
class C(A):
    def show(self): print("C")
class D(B, C):    # multiple inheritance
    pass

d = D()
d.show()          # follows MRO: D -> B -> C -> A
print(D.__mro__)
B (<class 'D'>, <class 'B'>, <class 'C'>, <class 'A'>, <class 'object'>)

Summary

  • Python allows multiple inheritance (D from B and C).
  • MRO decides method order: check with ClassName.__mro__.
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