Is this possible in Python? SOLUTION FOUND

[Steven D'Aprano]

On Tue, 14 Mar 2006 13:33:01 -0800, alainpoint wrote:

> 
> Kay Schluehr wrote:
>> alainpoint at yahoo.fr wrote:
>> > jalanb wrote:
>> > > You might like the version here:
>> > > http://www.jorendorff.com/toys/out.html
>> > >
>> > > Especially the "need to know" presentation, which is cute
>> > >
>> > > --
>> > > Alan
>> > > http://aivipi.blogspot.com
>> >
>> > Thank you for the tip.
>> > Meanwhile, I found a shorter solution to my problem:
>> > def magic(arg):
>> > 	import inspect
>> > 	return inspect.stack()[1][4][0].split("magic")[-1][1:-1]
>> >
>> > assert magic(3+4)=="3+4"
>> >
>> > Alain
>>
>> Does it? Using your function I keep an assertion error. Storing the
>> return value of magic()in a variable s I receive the following result:
>>
>> def magic(arg):
>>     import inspect
>>     return inspect.stack()[1][4][0].split("magic")[-1][1:-1]
>>
>> s = magic(3+4) # magic line
>>
>> >>> s
>> 'lin'
>>
>>
>> BTW grepping the stack will likely cause context sensitive results.
>>
>> Kay
> 
> 
> This is no production-ready code, just a proof of concept.
> Adding 3 or 4 lines would make it more robust.
> Just hope someone else will benefit from this discussion.

Doesn't work for me either:

>>> def magic(arg):
...     import inspect
...     return inspect.stack()[1][4][0].split("magic")[-1][1:-1]
...
>>> magic(3+4)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 3, in magic
TypeError: unsubscriptable object


Kay gets an AssertionError, I get a TypeError. I think describing it as
"proof of concept" is rather optimistic.

Here is the inspect.stack() I get:

[(<frame object at 0x825d974>, '<stdin>', 2, 'magic', None, None),
(<frame object at 0x8256534>, '<stdin>', 1, '?', None, None)]


-- 
Steven.