assert type([]) == type(())

[Josh Holland]

On 2010-01-02, VanceE <vnewel at invalid.invalid> wrote:
> for x in []:
>     assert type(x) == type(())
>
> I expected an AssertionError but get no errors at all.
> Any explaination?

That loop never runs. It immediately raises a StopIteration and the body
is never executed.
cf.

for x in []:
    print "In loop body"

You won't see anything printed.

OTOH, look at this one:

for x in [[]]: # a list containing an empty list
    assert type(x) == type(())

That will raise the AssertionError as expected.


-- 
Josh "dutchie" Holland <jrh at joshh.co.uk>
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