Python Multiple Inheritance

1) Simple Multiple Inheritance

Create:

class A:
    def greet(self): print("Hello from A")
class B:
    def greet2(self): print("Hello from B")

Make class C(A, B) and call both methods.

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2) Override Same Method

Define both A and B with a method show(), then inherit in C(A, B) and call show() — observe which one runs (MRO).

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3) Constructor Inheritance

Define:

class A:
    def __init__(self): print("Init A")
class B:
    def __init__(self): print("Init B")

Make C(A, B) and instantiate it; observe what prints.

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4) Use super() with Multiple Inheritance

Modify 3 so C.__init__() calls super().__init__() and observe order.

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5) Inherit Attributes

Give class A an attribute x = 10 and class B y = 20. Make C(A, B) and print both.

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6) Method from One Parent

In class A define a_method(), in class B define b_method(). Inherit in C(A, B) and call both.

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7) Mixed Parents

Make class A with arithmetic methods, class B with string methods. Class C(A, B) should combine both.

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8) Diamond Inheritance Pattern

Create:

A → B  
A → C  
B, C → D

Give all a msg() method and print from D.

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9) Call Specific Parent Method

In multiple inheritance class C, call only parent B’s method even if overridden.

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10) Shared Attribute Conflict

Both parents have value = 5 and value = 10 respectively. In child, print resolved value.

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11) Inherit Constructors With Parameters

Make:

class A:
    def __init__(self, a): ...
class B:
    def __init__(self, b): ...

Combine in child so both initialize.

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12) Combine Method Results

Parent A returns 10, B returns 20. Child method adds them.

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13) Parent Method Calls

In class C(A, B), override a method and inside it call both parents’ versions explicitly.

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14) Multiple Inheritance With Utility Classes

Make a Logger class, an Entity class, and a child User(Logger, Entity) that uses both.

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15) Method Resolution Order (MRO) Check

Print the MRO of class C(A, B, object) using:

print(C.mro())

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16) Parent With Default Values

Parent A initializes name, parent B initializes age. Child inherits both attributes and prints them.

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17) Conflict Resolution With super()

Parents override same method; child uses super() to unify behavior.

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18) Inherit Behavior & Add New

Create parents Mover and Speaker. Child Robot(Mover, Speaker) then also adds unique method.

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19) Simple Multi-Level + Multiple Inherit

Create class X, Y, Z. Make W(X, Y) and then P(W, Z). Call a method from all.

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20) Validate Combined Functionality

Create parent Validator, parent Formatter, child Field(Validator, Formatter) and demonstrate calling both parent functionalities.

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📝 Concepts Practiced

Concept	Why It Matters
Multiple parent classes	Combining behavior
MRO (Method Resolution Order)	Python’s inheritance lookup
Constructors with multiple parents	Handling initialization
Overriding & calling parent methods	Managing conflicts
super() usage	Simplifying multi-inherit calls

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💡 Starter Template

class A:
    def hello(self):
        print("Hello from A")

class B:
    def hello_b(self):
        print("Hello from B")

class C(A, B):
    pass

c = C()
c.hello()
c.hello_b()

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canvil: 333f6c7d-6876-4f7e-b6ad-1bdb2233f5c1