At Thursday 28/12/2006 14:01, Maksim Kasimov wrote:
> Nothing so clever. dir() eats and ignores all exceptions, so when you
> hit the recursion limit it eats the RecursionLimitExceeded exception
> and continues merrily along the way. This is probably not good
> behavior...
>
> class Foo:
> def __getattr__(self, attr):
> raise SystemExit, "Don't call me, again, ever"
>
> f = Foo()
> f.method() #dies correctly
> dir(f) #continues happily
can't understand - what kind of problem you tried to fix in that way?
if __getattr__ just raise some exception, it needless to define it at all.
The problem is, dir() blindly eats *all* exceptions, including the
RecursionLimitExceeded on the original post, this SystemExit,
KeyboardInterrupt, etc. It shouldn't.
Perhaps this example (esencially the same thing) is a bit more clear:
import sys
class Foo:
def __getattr__(self, attr):
print "About to exit program"
sys.exit(1)
f = Foo()
dir(f)
print "You should not see this line"
--
Gabriel Genellina
Softlab SRL
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