Fix mypy type errors

CURA-6057

cura/UI/ObjectsModel.py

@@ -51,12 +51,14 @@ class ObjectsModel(ListModel):
         group_nr = 1
         name_count_dict = defaultdict(int)  # type: Dict[str, int]
 
-        for node in DepthFirstIterator(Application.getInstance().getController().getScene().getRoot()):
+        for node in DepthFirstIterator(Application.getInstance().getController().getScene().getRoot()):  # type: ignore
             if not isinstance(node, SceneNode):
                 continue
             if (not node.getMeshData() and not node.callDecoration("getLayerData")) and not node.callDecoration("isGroup"):
                 continue
-            if node.getParent() and node.getParent().callDecoration("isGroup"):
+
+            parent = node.getParent()
+            if parent and parent.callDecoration("isGroup"):
                 continue  # Grouped nodes don't need resetting as their parent (the group) is resetted)
             if not node.callDecoration("isSliceable") and not node.callDecoration("isGroup"):
                 continue
@@ -72,7 +74,7 @@ class ObjectsModel(ListModel):
                 group_nr += 1
 
             if hasattr(node, "isOutsideBuildArea"):
-                is_outside_build_area = node.isOutsideBuildArea()
+                is_outside_build_area = node.isOutsideBuildArea()  # type: ignore
             else:
                 is_outside_build_area = False
                 

cura/UI/TextManager.py

@@ -2,7 +2,7 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import collections
-from typing import Optional
+from typing import Optional, Dict, List, cast
 
 from PyQt5.QtCore import QObject, pyqtSlot
 
@@ -29,9 +29,9 @@ class TextManager(QObject):
     def _loadChangeLogText(self) -> str:
         # Load change log texts and organize them with a dict
         file_path = Resources.getPath(Resources.Texts, "change_log.txt")
-        change_logs_dict = {}
+        change_logs_dict = {}  # type: Dict[Version, Dict[str, List[str]]]
         with open(file_path, "r", encoding = "utf-8") as f:
-            open_version = None
+            open_version = None  # type: Optional[Version]
             open_header = ""  # Initialise to an empty header in case there is no "*" in the first line of the changelog
             for line in f:
                 line = line.replace("\n", "")
@@ -43,11 +43,11 @@ class TextManager(QObject):
                     change_logs_dict[open_version] = collections.OrderedDict()
                 elif line.startswith("*"):
                     open_header = line.replace("*", "")
-                    change_logs_dict[open_version][open_header] = []
+                    change_logs_dict[cast(Version, open_version)][open_header] = []
                 elif line != "":
-                    if open_header not in change_logs_dict[open_version]:
-                        change_logs_dict[open_version][open_header] = []
-                    change_logs_dict[open_version][open_header].append(line)
+                    if open_header not in change_logs_dict[cast(Version, open_version)]:
+                        change_logs_dict[cast(Version, open_version)][open_header] = []
+                    change_logs_dict[cast(Version, open_version)][open_header].append(line)
 
         # Format changelog text
         content = ""