[Tutor] Why is an instance smaller than the sum of its components?

[Danny Yoo]

>>
>> Summary questions:
>>
>> 1 - Why are foo's and bar's class sizes the same? (foo's just a nop)
>
>
> i'm not sure on this one.
>
>> 2 - Why are foo() and bar() the same size, even with bar()'s 4 integers?
>
>
> neither foo() nor bar() return anything explicitly, so both return the
> default none


This needs correction.  I think you're thinking of regular functions.
But 'foo' and 'bar' are the names of the classes, so this is instance
construction.


To demonstrate the difference:

#####################################
>>> class foo(object): pass
...
>>> foo()
<__main__.foo object at 0x7f27655c0fd0>
#####################################



Compare what we see here to:

######################################
>>> def bar(): pass
...
>>> bar()
>>>
######################################

where the interactive evaluator is suppressing output of the None value.