How can I exec() in global?

[Peter Otten]

Jerald wrote:

> Is it possible to exec() from within a function so the exec'd
> code affects global?
> 
> For example
> 
> def foo():
>      exec ('X=[1,2,3]')
> 
> And I'd like 'X' to be a global variable.

>>> x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'x' is not defined
>>> def foo():
...     exec "x = [1, 2, 3]" in globals()
...
>>> foo()
>>> x
[1, 2, 3]

Peter