Confused by List behavior
Michael Hudson
mwh21 at cam.ac.uk
Thu Apr 20 08:04:05 EDT 2000
ejbaker_seekonk at my-deja.com writes:
> As a python newbie, I entered this script to explore list processing
> behaviours.
>
> yy = dir()
> for element in yy:
> print element
>
> for element in yy:
> print dir(element)
>
> The first 'for' loop works as expected. It returns,
> ['__builtins__', '__doc__', '__name__'].
>
> The second loop, however, returns three empty lists. For the life of
> me, I can't understand that. Becauese, if I type 'dir(__builtins__)',
> in a script, I get all of the elements of __builtins__.
dir("__builtins__") != dir(__builtins__).
Maybe you want "getattr"? Eg.
for element in dir(ob):
print dir(getattr(ob,element))
Cheers,
M.
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