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Fix typing

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This commit is contained in:
Lipu Fei 2019-10-04 15:10:42 +02:00
parent 3c4d29a814
commit 4579b06f6d
1 changed files with 3 additions and 0 deletions
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3
cura/Machines/Models/IntentModel.py
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@ -94,6 +94,9 @@ class IntentModel(ListModel):
## Get the active materials for all extruders. No duplicates will be returned
def _get_active_materials(self) -> Set[MaterialNode]:
global_stack = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()
if global_stack is None:
return set()
container_tree = ContainerTree.getInstance()
machine_node = container_tree.machines[global_stack.definition.getId()]
nodes = set() # type: Set[MaterialNode]