Question about Pass-by-object-reference?

[Terry Reedy]

On 7/23/2014 1:36 AM, Steven D'Aprano wrote:
> On Tue, 22 Jul 2014 20:27:15 -0400, Terry Reedy wrote:
>
>> When you call a function, Python binds function parameter names to
>> argument objects in the function's local namespace, the same as in name
>> assignments. Given
>>
>> def f(a, b): pass
>>
>> a call f(1, 'x') starts by executing
>>
>> a, b = 1, 'x'
>>
>> in the local namespace.  Nothing is being 'passed'.
>
>
> If nothing is being passed, how does the function know to bind 1 and 'x'
> to names a and b, rather than (say) this?
>
> a, b = 23, 'Surprise!"

To quote your other message, "Magic happens, and a result is returned."

-- 
Terry Jan Reedy