gistfile1.txt

>>> class Num():
...   def __init__(self, value):
...     self.value = value
...   def get(self):
...     return self.value
...   def __add__(self, other):
...     return Num(self.value + other.value)
... 
>>> a = Num(3)
>>> b = a + Num(5)
>>> b.get()
8 
>>> b
<__main__.Num object at 0x7f503fa73908>
>>>