Fix typing in the FirmwareUpdateChecker plugin.

plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py

@@ -1,10 +1,12 @@
 # Copyright (c) 2017 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-import json, os
+import os
 from PyQt5.QtCore import QUrl
 from PyQt5.QtGui import QDesktopServices
 
+from typing import List
+
 from UM.Extension import Extension
 from UM.Application import Application
 from UM.Logger import Logger
@@ -19,12 +21,13 @@ from .FirmwareUpdateCheckerLookup import FirmwareUpdateCheckerLookup, get_settin
 
 i18n_catalog = i18nCatalog("cura")
 
+
 ## This Extension checks for new versions of the firmware based on the latest checked version number.
 #  The plugin is currently only usable for applications maintained by Ultimaker. But it should be relatively easy
 #  to change it to work for other applications.
 class FirmwareUpdateChecker(Extension):
 
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
 
         # Listen to a Signal that indicates a change in the list of printers, just if the user has enabled the
@@ -36,7 +39,8 @@ class FirmwareUpdateChecker(Extension):
         self._late_init = True  # Init some things after creation, since we need the path from the plugin-mgr.
         self._download_url = None
         self._check_job = None
-        self._name_cache = []
+        self._name_cache = []  # type: List[str]
+        self._lookups = None
 
     ##  Callback for the message that is spawned when there is a new version.
     def _onActionTriggered(self, message, action):
@@ -46,8 +50,8 @@ class FirmwareUpdateChecker(Extension):
                 QDesktopServices.openUrl(QUrl(download_url))
             else:
                 Logger.log('e', "Can't find URL for {0}".format(action))
-        except:
+        except Exception as ex:
-            Logger.log('e', "Don't know what to do with {0}".format(action))
+            Logger.log('e', "Don't know what to do with '{0}' because {1}".format(action, ex))
 
     def _onContainerAdded(self, container):
         # Only take care when a new GlobalStack was added

plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py

@@ -9,6 +9,7 @@ from UM.Version import Version
 
 import urllib.request
 from urllib.error import URLError
+from typing import Dict
 import codecs
 
 from .FirmwareUpdateCheckerLookup import FirmwareUpdateCheckerLookup, get_settings_key_for_machine
@@ -24,14 +25,14 @@ class FirmwareUpdateCheckerJob(Job):
     ZERO_VERSION = Version(STRING_ZERO_VERSION)
     EPSILON_VERSION = Version(STRING_EPSILON_VERSION)
 
-    def __init__(self, container=None, silent=False, lookups:FirmwareUpdateCheckerLookup=None, callback=None):
+    def __init__(self, container, silent, lookups: FirmwareUpdateCheckerLookup, callback) -> None:
         super().__init__()
         self._container = container
         self.silent = silent
         self._callback = callback
 
         self._lookups = lookups
-        self._headers = {}  # Don't set headers yet.
+        self._headers = {}  # type:Dict[str, str]  # Don't set headers yet.
 
     def getUrlResponse(self, url: str) -> str:
         result = self.STRING_ZERO_VERSION

plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerLookup.py

@@ -1,7 +1,9 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-import json, os
+import json
+
+from typing import Callable, Dict, List, Optional
 
 from UM.Logger import Logger
 from UM.Version import Version
@@ -22,7 +24,7 @@ def default_parse_version_response(response: str) -> Version:
 class FirmwareUpdateCheckerLookup:
     JSON_NAME_TO_VERSION_PARSE_FUNCTION = {"default": default_parse_version_response}
 
-    def __init__(self, json_path):
+    def __init__(self, json_path) -> None:
         # Open the .json file with the needed lookup-lists for each machine(/model) and retrieve 'raw' json.
         machines_json = None
         with open(json_path, "r", encoding="utf-8") as json_file:
@@ -32,11 +34,11 @@ class FirmwareUpdateCheckerLookup:
             return
 
         # Parse all the needed lookup-tables from the '.json' file(s) in the resources folder.
-        self._machine_ids = []
+        self._machine_ids = []  # type:List[int]
-        self._machine_per_name = {}
+        self._machine_per_name = {}  # type:Dict[str, int]
-        self._parse_version_url_per_machine = {}
+        self._parse_version_url_per_machine = {}  # type:Dict[int, Callable]
-        self._check_urls_per_machine = {}
+        self._check_urls_per_machine = {}  # type:Dict[int, List[str]]
-        self._redirect_user_per_machine = {}
+        self._redirect_user_per_machine = {}  # type:Dict[int, str]
         try:
             for machine_json in machines_json:
                 machine_id = machine_json.get("id")
@@ -53,20 +55,20 @@ class FirmwareUpdateCheckerLookup:
                 for check_url in machine_json.get("check_urls"):
                     self._check_urls_per_machine[machine_id].append(check_url)
                 self._redirect_user_per_machine[machine_id] = machine_json.get("update_url")
-        except:
+        except Exception as ex:
-            Logger.log('e', "Couldn't parse firmware-update-check loopup-lists from file.")
+            Logger.log('e', "Couldn't parse firmware-update-check loopup-lists from file because {0}.".format(ex))
 
-    def getMachineIds(self) -> [int]:
+    def getMachineIds(self) -> List[int]:
         return self._machine_ids
 
-    def getMachineByName(self, machine_name: str) -> int:
+    def getMachineByName(self, machine_name: str) -> Optional[int]:
         return self._machine_per_name.get(machine_name)
 
-    def getParseVersionUrlFor(self, machine_id: int) -> str:
+    def getParseVersionUrlFor(self, machine_id: int) -> Optional[Callable]:
         return self._parse_version_url_per_machine.get(machine_id)
 
-    def getCheckUrlsFor(self, machine_id: int) -> [str]:
+    def getCheckUrlsFor(self, machine_id: int) -> Optional[List[str]]:
         return self._check_urls_per_machine.get(machine_id)
 
-    def getRedirectUserFor(self, machine_id: int) -> str:
+    def getRedirectUserFor(self, machine_id: int) -> Optional[str]:
         return self._redirect_user_per_machine.get(machine_id)