Yet Another Newbie Question (YANQ)

[Enrique]

"David A." wrote:

> Hi to everyone,
>
>     I am playing around with python and I have 1 quetions where I hope
> someone can help
>
> I have this problem:
>
> >>> a='a'
> >>> prt='print'
> >>> t=prt+' '+a
> >>> t
> 'print a'
>
> now when I try to:
> >>> eval(t)
> Traceback (innermost last):
>   File "<pyshell#18>", line 1, in ?
>     eval(t)
>   File "<string>", line 1
>     print a
>         ^
> SyntaxError: invalid syntax
>
> can someone explain me what I am doing wrong! Why can't I use eval(print)?
> Any help is welcome!

I thinks it is a semantic confusion:
eval() evaluates an _expression_    (like i*(a+b-5))
exec() executes an _statement_      (print a,            del b,    import
moduleX)

Enrique