Global VS Local Subroutines

[Rob Cliffe]

On 10/02/2022 21:43, Friedrich Rentsch wrote:
> I believe to have observed a difference which also might be worth 
> noting: the imbedded function a() (second example) has access to all 
> of the imbedding function's variables, which might be an efficiency 
> factor with lots of variables. The access is read-only, though. If the 
> inner function writes to one of the readable external variables, that 
> variable becomes local to the inner function.
You can make it continue to refer to the variables of the imbedding 
function, i.e. b(), by declaring them non-local, e.g.
     nonlocal c
Rob Cliffe
>
>
> Frederic
>
> On 2/10/22 1:13 PM, BlindAnagram wrote:
>> Is there any difference in performance between these two program 
>> layouts:
>>
>>    def a():
>>      ...
>>    def(b):
>>      c = a(b)
>>
>> or
>>
>>    def(b):
>>      def a():
>>        ...
>>      c = a(b)
>>
>> I would appreciate any insights on which layout to choose in which 
>> circumstances.
>>
>