Change Conn Name to Prevent Outer Scope and Typing

Connection variable for changing to WAL mode was shadowing the other
connection variables inside functions so changed it to make it distinct.
Also added typing corrections.

BCK-7002-3

Author: Jacob Pan

alerts_backend/python/app.py

@@ -1,7 +1,7 @@
 """Query alert information from AeroAPI and present it to a frontend service"""
 import os
 from datetime import datetime
-from typing import Dict, Any, Union
+from typing import Dict, Any, Tuple
 
 import json
 import requests
@@ -26,9 +26,9 @@
     "sqlite+pysqlite:////var/db/aeroapi_alerts/aeroapi_alerts.db", echo=False, future=True
 )
 # Set journal_mode to WAL to enable reading and writing concurrently
-with engine.connect() as conn:
-    conn.exec_driver_sql("PRAGMA journal_mode=WAL")
-    conn.commit()
+with engine.connect() as conn_wal:
+    conn_wal.exec_driver_sql("PRAGMA journal_mode=WAL")
+    conn_wal.commit()
 
 # Define tables and metadata to insert and create
 metadata_obj = MetaData()
@@ -86,7 +86,7 @@ def create_tables():
         raise e
 
 
-def insert_into_table(data_to_insert: Dict[str, Union[str, int, bool]], table: Table) -> int:
+def insert_into_table(data_to_insert: Dict[str, Any], table: Table) -> int:
     """
     Insert object into the database based off of the table.
     Assumes data_to_insert has values for all the keys
@@ -107,7 +107,7 @@ def insert_into_table(data_to_insert: Dict[str, Union[str, int, bool]], table: T
 
 
 @app.route("/post", methods=["POST"])
-def handle_alert() -> (Response, int):
+def handle_alert() -> Tuple[Response, int]:
     """
     Function to receive AeroAPI POST requests. Filters the request
     and puts the necessary data into the SQL database.
@@ -117,9 +117,9 @@ def handle_alert() -> (Response, int):
     r_title: str
     r_detail: str
     r_status: int
-    data: Dict[Any] = request.json
+    data: Dict[str, Any] = request.json
     # Process data by getting things needed
-    processed_data: Dict[Any]
+    processed_data: Dict[str, Any]
     try:
         processed_data = {
             "long_description": data["long_description"],
@@ -169,7 +169,7 @@ def create_alert() -> Response:
     r_description: str = ''
     # Process json
     content_type = request.headers.get("Content-Type")
-    data: Dict[Any]
+    data: Dict[str, Any]
 
     if content_type != "application/json":
         r_description = "Invalid content sent"