Huh, that is super weird.
I'm getting the same behavior. It probably has something to do with how
maya is exec-ing the listener. Clearly it is throwing the exception, it
just getting swallowed somewhere along the way. Maybe the for loop is
grabbing it? execution does stop though.
Really weird.
On Wednesday, October 11, 2017 at 10:30:35 PM UTC-5, Michael Boon wrote:
>
> I'm on Windows. To clarify though, it's not about StopIteration being
> available (except in 2015, apparently). It's about StopIteration being
> silently caught. This appears to only happen in the Listener. In 2018, at
> least, if I try it in an imported Python module, it works as expected. I
> don't know what would happen in external editors.
>
> To add to the confusion, if you catch and raise the exception, it works.
> This
> i = iter([0,1])
> for n in range(3):
> print n, next(i)
> fails silently:
> 0 0
> 1 1
> 2
>
> While this
> i = iter([0,1])
> for n in range(3):
> try:
> print n, next(i)
> except Exception as e:
> raise
> shows the unhandled exception:
> 0 0
> 1 1
> 2# Error:
> # Traceback (most recent call last):
> # File "<maya console>", line 4, in <module>
> # StopIteration #
>
>
> On Thursday, 12 October 2017 08:09:43 UTC+11, Robert White wrote:
>>
>> I can see StopIteration just fine in 2018 on windows.
>>
>> It should live in both __builtins__ and the exceptions module.
>> Maybe some other script is messing those up?
>>
>> On Wednesday, October 11, 2017 at 3:23:57 PM UTC-5, Justin Israel wrote:
>>>
>>> Is this only in Windows? I just tested 2016, 2017, and 2018. They all
>>> have StopIteration available.
>>>
>>> On Tue, Oct 10, 2017 at 7:40 PM Marcus Ottosson <konstr...@gmail.com>
>>> wrote:
>>>
>>>> Can confirm that it is defined in 2018 as well. The above was in 2015.
>>>> How peculiar.
>>>>
>>>> On 10 October 2017 at 07:22, Michael Boon <boon...@gmail.com> wrote:
>>>>
>>>>> Wow! Happens in 2016 too.
>>>>> However, StopIteration is defined, and I can catch it.
>>>>>
>>>>> This:
>>>>> a = iter([1,2])
>>>>> for i in range(4):
>>>>> print i, next(a)
>>>>> gives
>>>>> 0 1
>>>>> 1 2
>>>>> 2
>>>>>
>>>>> While this:
>>>>> a = iter([1,2])
>>>>> for i in range(4):
>>>>> try:
>>>>> print i, next(a)
>>>>> except StopIteration:
>>>>> print 'StopIteration'
>>>>> gives
>>>>> 0 1
>>>>> 1 2
>>>>> 2 StopIteration
>>>>> 3 StopIteration
>>>>>
>>>>>
>>>>> On Tuesday, 10 October 2017 00:03:12 UTC+11, Marcus Ottosson wrote:
>>>>>>
>>>>>> I remember having this a while back, but this time it really
>>>>>> flabbergasted me.
>>>>>>
>>>>>> def iterator():
>>>>>> yield
>>>>>>
>>>>>> it = iterator()
>>>>>> next(it)
>>>>>> next(it)
>>>>>>
>>>>>> Or take this one.
>>>>>>
>>>>>> next(i for i in range(0))
>>>>>>
>>>>>> What should happen is this.
>>>>>>
>>>>>> Traceback (most recent call last):
>>>>>> File "<stdin>", line 1, in <module>
>>>>>> StopIteration
>>>>>>
>>>>>> But instead, nothing. It’s problem when this happens somewhere in
>>>>>> your code.
>>>>>>
>>>>>> def create_transform():
>>>>>> transform = cmds.createNode("transform", name="MyTransform")
>>>>>> next(i for i in range(0))
>>>>>> return transform
>>>>>>
>>>>>> transform = create_transform()
>>>>>> print(transform)# Error: name 'transform' is not defined# Traceback
>>>>>> (most recent call last):# File "<maya console>", line 1, in <module>#
>>>>>> NameError: name 'transform' is not defined #
>>>>>>
>>>>>> It’s not defined, because that line never runs. An exception is
>>>>>> thrown, silently, stopping the script.
>>>>>>
>>>>>> Other exceptions run fine.
>>>>>>
>>>>>> 1/0# Error: integer division or modulo by zero# Traceback (most recent
>>>>>> call last):# File "<maya console>", line 1, in <module>#
>>>>>> ZeroDivisionError: integer division or modulo by zero #
>>>>>>
>>>>>> Normally, you can instantiate an exception yourself, like this.
>>>>>>
>>>>>> ZeroDivisionError# Result: <type 'exceptions.ZeroDivisionError'> #
>>>>>>
>>>>>> But guess what happens for StopIteration?
>>>>>>
>>>>>> StopIteration# Error: name 'StopIterationError' is not defined#
>>>>>> Traceback (most recent call last):# File "<maya console>", line 1, in
>>>>>> <module># NameError: name 'StopIterationError' is not defined #
>>>>>>
>>>>>> This is in Maya 2015 and 2018, and I bet it happens in other versions
>>>>>> too. A native exception is undefined. What gives?
>>>>>>
>>>>>>
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