How are methods resolved in Python with multiple inheritance (MRO)?

In Python, the method resolution order (MRO) in multiple inheritance is determined by the C3 linearization algorithm. It constructs a linear order of classes that respects the inheritance order and ensures consistency.

When a method is called, Python searches for it in the object's class, then in the parent classes in the order defined by the MRO.

Example:

class A:
    def method(self):
        print("A")

class B(A):
    def method(self):
        print("B")

class C(A):
    def method(self):
        print("C")

class D(B, C):
    pass

d = D()
 d.method()  # Will print "B"
print(D.mro())  # Shows the method search order

Here, the method will be found in class B because the MRO for D is [D, B, C, A, object].

Thus, the MRO guarantees a predictable and unambiguous method search order in multiple inheritance.