Python: This example demonstrates overrides for class methods for testing == and !=

Python Class == != overrides | .py

# Imports
# ------------------------------------------------------------------------------
import sys
import uuid

# Class Object
# ------------------------------------------------------------------------------
class Node(object):
    def __init__(self, name="", age=None):
        self.name = name
        self.age = age
        self.uid = str( uuid.uuid4( ) )

    def __eq__(self, other):
        # return self.uid == other.uid
        # return self.value == other.value
        return isinstance(self, other.__class__) and self.uid == other.uid

    def __ne__(self, other):
        # return self != other
        return not self.__eq__(other)


class Person(Node):
    def __init__(self, name="", age=0 ):
        super(Person, self).__init__(name=name, age=age)
        
class Kid(Node):
    def __init__(self, name="", age=0 ):
        super(Kid, self).__init__(name=name, age=age)


A = Person("Jeff")
B = Person("Mindy")
C = A
D = Kid("Doug")


print "Should be True:", A == C
print "Should be False:" , A != C
print "Should be False:" , A == B
print "Should be True:", A != B

print "Should be False:", A == D
print "Should be True:" , A != D
print "Should be False:" , D != D

print A.uid
print hash(A.uid)

Python Deep Copy Override | .py

import copy
import uuid

# Classes
class Node(object):
    def __init__(self, name):
        self.name = name
        self.uid = str( uuid.uuid4( ) )

    def copy_node(self):
        new_node = copy.deepcopy( self )
        new_node.uid = str( uuid.uuid4( ) )
        return new_node

class Truck(Node):
    def __init__(self, name=""):
        super(Truck, self).__init__(name=name)


old_truck = Truck( name="Tonka Truck")
new_truck = old_truck.copy_node()

print old_truck.uid
print new_truck.uid