[Tutor] Code evaluation inside of string fails with __get_item

[David Hutto]

On Sun, Dec 12, 2010 at 2:42 PM, Tim Johnson <tim at johnsons-web.com> wrote:
> * Steven D'Aprano <steve at pearwood.info> [101211 17:20]:
>> Tim Johnson wrote:
>>
>>>   I've never had the occasion to use assert() or any other
>>>   python - shooting tools, any thoughts on that?
>>
>>
>> Assertions are a great tool, but never ever, under pain of great pain,
>> use assert for testing user input or function arguments.
> <.....>
>>
>> Who makes that choice? You, or the caller? If the caller, then any
>> errors that occur are not internal state, and you shouldn't use assert.
>> If you, then it's an internal detail and you can use assert.
>
>  Steven: Thanks very much for taking so much time and effort to
>  answer my question. I will file this writing for future and
>  ongoing reference.
>
>  BTW: I was able to solve the problem. Essentially a clone of
>  Eval() was being called and probably clobbering the stack frame.
>  It was a tedious process of tracking thru known and likely code
>  dependencies and insert debugging stubs. I've written my own
>  debugging macros using vimscript and from your input I would guess
>  that assert would have just clouded the process.
>
>  thanks again.
> --
> Tim
> tim at johnsons-web.com or akwebsoft.com
> http://www.akwebsoft.com
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 Thanks steven, you're the best.