inheritance1

inheritance_wrong.py

class A:
    def __init__(self, v):
        self.v = v
    
    def __lt__(self, other):
        print(f'A: {self.v} < {other.v} ?')
        return self.v < other.v
    
class B(A):
    def __lt__(self, other):
        print(f'B: {self.v} < {other.v} ?')
        return self.v < other.v 
        
>>> B(5) < A(7)
B: 5 < 7 ?                < -- right
True

>>> A(5) < B(7)
A: 5 < 7 ?                < -- wrong!
True