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 <[email protected]>
>> 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 <[email protected]> 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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>>>
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