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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