Fix some IDE warnings, mostly around type safety on the Python side

server/handlers/api/spots.py

@@ -3,16 +3,18 @@ import json
 import logging
 from datetime import datetime, timedelta
 from queue import Queue
+from typing import Any
 
 import pytz
 import tornado
 import tornado_eventsource.handler
+from tornado import httputil
+from tornado.web import Application
 
 from core.prometheus_metrics_handler import api_requests_counter
 from core.utils import serialize_everything, empty_queue
 from data.lookup_credentials import extract_credentials
 
-
 SSE_HANDLER_MAX_QUEUE_SIZE = 1000
 SSE_HANDLER_QUEUE_CHECK_INTERVAL = 5000
 
@@ -20,6 +22,11 @@ SSE_HANDLER_QUEUE_CHECK_INTERVAL = 5000
 class APISpotsHandler(tornado.web.RequestHandler):
     """API request handler for /api/v1/spots"""
 
+    def __init__(self, application: "Application", request: httputil.HTTPServerRequest, **kwargs: Any):
+        self._spots = None
+        self._web_server_metrics = None
+        super().__init__(application, request, **kwargs)
+
     def initialize(self, spots, web_server_metrics):
         self._spots = spots
         self._web_server_metrics = web_server_metrics
@@ -67,6 +74,15 @@ class APISpotsHandler(tornado.web.RequestHandler):
 class APISpotsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
     """API request handler for /api/v1/spots/stream"""
 
+    def __init__(self, application, request, **kwargs: Any):
+        self._sse_spot_queues = None
+        self._web_server_metrics = None
+        self._query_params = None
+        self._credentials = None
+        self._spot_queue = None
+        self._heartbeat = None
+        super().__init__(application, request, **kwargs)
+
     def initialize(self, sse_spot_queues, web_server_metrics):
         self._sse_spot_queues = sse_spot_queues
         self._web_server_metrics = web_server_metrics