Question

How to use multiple inheritance and method resolution order (MRO) in Python

Answer 1

class A:
    def m(self):
        print("class A: m(self)")
 
 
class B(A):
    def m(self):
        print("class B(A): m(self)")
 
 
class C(A):
    def m(self):
        print("class C(A): m(self)")
 
 
class D(B, C):
    def m(self):
        print("class D(B, C): m(self)")


do = D()
B.m(do)

 
'''
run:
 
class B(A): m(self)
 
'''

 

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Answer 2

class A:
    def m(self):
        print("class A: m(self)")
 
 
class B(A):
    def m(self):
        print("class B(A): m(self)")
 
 
class C(A):
    def m(self):
        print("class C(A): m(self)")
 
 
class D(B, C):
    def m(self):
        print("class D(B, C): m(self)")

do = D()
C.m(do)

 
'''
run:
 
class C(A): m(self)
 
'''

 

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Answer 3

class A:
    def m(self):
        print("class A: m(self)")
 
 
class B(A):
    def m(self):
        print("class B(A): m(self)")
 
 
class C(A):
    def m(self):
        print("class C(A): m(self)")
 
 
class D(B, C):
    def m(self):
        print("class D(B, C): m(self)")

do = D()
A.m(do)

 
'''
run:
 
class A: m(self)
 
'''

 

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Answer 4

class A:
    def m(self):
        print("class A: m(self)")
 
 
class B(A):
    def m(self):
        print("class B(A): m(self)")
 
 
class C(A):
    def m(self):
        print("class C(A): m(self)")
 
 
class D(B, C):
    def m(self):
        print("class D(B, C): m(self)")
        A.m(self)
        B.m(self)
        C.m(self)

do = D()
do.m()

 
'''
run:
 
class D(B, C): m(self)
class A: m(self)
class B(A): m(self)
class C(A): m(self)
 
'''

 

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Answer 5

class A:
    def m(self):
        print("class A: m(self)")
 
 
class B(A):
    def m(self):
        print("class B(A): m(self)")
        A.m(self)
 
 
class C(A):
    def m(self):
        print("class C(A): m(self)")
        A.m(self)
 
 
class D(B, C):
    def m(self):
        print("class D(B, C): m(self)")
        B.m(self)
        C.m(self)

do = D()
do.m()

 
'''
run:
 
class D(B, C): m(self)
class B(A): m(self)
class A: m(self)
class C(A): m(self)
class A: m(self)
 
'''

 

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