Add types for backup metadata

cura/Backups/Backup.py

@@ -1,12 +1,13 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
+
 import io
 import os
 import re
 
 import shutil
 
-from typing import Optional
+from typing import Dict, Optional
 from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
 
 from UM import i18nCatalog
@@ -28,9 +29,9 @@ class Backup:
     # Re-use translation catalog.
     catalog = i18nCatalog("cura")
 
-    def __init__(self, zip_file: bytes = None, meta_data: dict = None) -> None:
+    def __init__(self, zip_file: bytes = None, meta_data: Dict[str, str] = None) -> None:
         self.zip_file = zip_file  # type: Optional[bytes]
-        self.meta_data = meta_data  # type: Optional[dict]
+        self.meta_data = meta_data  # type: Optional[Dict[str, str]]
 
     ##  Create a back-up from the current user config folder.
     def makeFromCurrent(self) -> None:

cura/Backups/BackupsManager.py

@@ -1,6 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-from typing import Optional, Tuple
+
+from typing import Dict, Optional, Tuple
 
 from UM.Logger import Logger
 from cura.Backups.Backup import Backup
@@ -18,7 +19,7 @@ class BackupsManager:
     ##  Get a back-up of the current configuration.
     #   \return A tuple containing a ZipFile (the actual back-up) and a dict
     #   containing some metadata (like version).
-    def createBackup(self) -> Tuple[Optional[bytes], Optional[dict]]:
+    def createBackup(self) -> Tuple[Optional[bytes], Optional[Dict[str, str]]]:
         self._disableAutoSave()
         backup = Backup()
         backup.makeFromCurrent()
@@ -30,7 +31,7 @@ class BackupsManager:
     #   \param zip_file A bytes object containing the actual back-up.
     #   \param meta_data A dict containing some metadata that is needed to
     #   restore the back-up correctly.
-    def restoreBackup(self, zip_file: bytes, meta_data: dict) -> None:
+    def restoreBackup(self, zip_file: bytes, meta_data: Dict[str, str]) -> None:
         if not meta_data.get("cura_release", None):
             # If there is no "cura_release" specified in the meta data, we don't execute a backup restore.
             Logger.log("w", "Tried to restore a backup without specifying a Cura version number.")
@@ -43,13 +44,13 @@ class BackupsManager:
         if restored:
             # At this point, Cura will need to restart for the changes to take effect.
             # We don't want to store the data at this point as that would override the just-restored backup.
-            self._application.windowClosed(save_data=False)
+            self._application.windowClosed(save_data = False)
 
     ##  Here we try to disable the auto-save plug-in as it might interfere with
     #   restoring a back-up.
-    def _disableAutoSave(self):
+    def _disableAutoSave(self) -> None:
         self._application.setSaveDataEnabled(False)
 
     ##  Re-enable auto-save after we're done.
-    def _enableAutoSave(self):
+    def _enableAutoSave(self) -> None:
         self._application.setSaveDataEnabled(True)