Handling Method Conflicts in Multiple Inheritance

When dealing with multiple inheritance, Python follows the Method Resolution Order (MRO) too resolve conflicts between methods with the same name. The MRO follows a left-to-right, depth-first search pattern.

Left Class Priority (No Direct Method)

When the left base class doesn't directly contain the method:

class Base:
    def show(self):
        print('Base class')

class LeftChild(Base):
    pass

class RightChild(Base):
    def show(self):
        print('Right child override')

class MultiInherit(LeftChild, RightChild):
    def __init__(self):
        self.show()

instance = MultiInherit()

Output shows RightChild's method takes precedence when LeftChild doesn't directly implement it.

Multi-Level Inheritance Impact

class Root:
    def render(self):
        print('Root method')

class Intermediate(Root):
    def render(self):
        print('Intermediate override')

class LeftBranch(Intermediate):
    pass

class RightBranch(Root):
    def render(self):
        print('Right branch override')

class Composite(LeftBranch, RightBranch):
    def __init__(self):
        self.render()

obj = Composite()

Here LeftBranch's inherited method from Intermediate takes priority due to deeper inheritance depth.

Key Resolution Rules:

1. Direct Implementation: If the left class direct implements the method, it always takes precedence
2. Same Inheritance Line: When both classes inherit from the same ancestor, deeper inheritance depth wins
3. Different Branches: For unrelated inheritance paths, left class always has priority

Python's MRO ensures predictable method resolution while maintaining logical consistency across inheritance hierarchies.