Nuke Input process node sourcing improvements

openpype/hosts/nuke/api/lib.py

@@ -897,18 +897,24 @@ def get_view_process_node():
  for v_ in nuke.allNodes(filter="Viewer"):
  ipn = v_['input_process_node'].getValue()
  ipn_node = nuke.toNode(ipn)
- if ipn_node:
- if ipn == "VIEWER_INPUT":
- # since it is set by default we can ignore it
- # nobody usually use this
- continue
- else:
- # in case a Viewer node is transfered from
- # different workfile with old values
- raise NameError((
- "Input process node name '{}' set in "
- "Viewer '{}' is does't exists in nodes"
- ).format(ipn, v_.name()))
+
+ # skip if no input node is set
+ if not ipn:
+ continue
+
+ if ipn == "VIEWER_INPUT" and not ipn_node:
+ # since it is set by default we can ignore it
+ # nobody usually use this but use it if
+ # it exists in nodes
+ continue
+
+ if not ipn_node:
+ # in case a Viewer node is transfered from
+ # different workfile with old values
+ raise NameError((
+ "Input process node name '{}' set in "
+ "Viewer '{}' is does't exists in nodes"
+ ).format(ipn, v_.name()))
 
  ipn_node.setSelected(True)