Fix T58772: Stray "forward" and "up" options in 2.8 import addons?
Nice side-effect of using new __annotations__ thingy to store dynamically-generated fields in a class: __annotations__ dict is not ensured to exist for a given class, so we may end up modifying on of the parents' one!
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@ -127,6 +127,11 @@ def orientation_helper(axis_forward='Y', axis_up='Z'):
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with specified default values (axes).
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"""
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def wrapper(cls):
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# Without that, we may end up adding those fields to some **parent** class' __annotations__ property
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# (like the ImportHelper or ExportHelper ones)! See T58772.
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if "__annotations__" not in cls.__dict__:
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cls.__dict__["__annotations__"] = {}
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def _update_axis_forward(self, context):
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if self.axis_forward[-1] == self.axis_up[-1]:
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self.axis_up = (self.axis_up[0:-1] +
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