refector: optimized concurrent.futures

aws-ddb.py

@@ -25,8 +25,7 @@ def getResources(region_name: str) -> list[list[str | int]]:
         for t in table_names:
             resp2 = client.describe_table(TableName=t)
             i = resp2['Table']
-            if i:
-                return_data.append([i['TableName'], i['TableStatus'], i['TableSizeBytes'], i['ItemCount'], region_name])
+            return_data.append([i['TableName'], i['TableStatus'], i['TableSizeBytes'], i['ItemCount'], region_name])
     return return_data
 
 # Main function
@@ -35,16 +34,14 @@ def main() -> None:
     wb = load_workbook('aws-inventory.xlsx')
     ws = wb.create_sheet("DynamoDB")
 
-    final_data = []
     ws.append(["TableName", "TableStatus", "TableSizeBytes", "ItemCount", "Region"])
-    with concurrent.futures.ProcessPoolExecutor(max_workers=6) as executor:
-        futures = [executor.submit(getResources, region_name=r) for r in getRegions()]
-        for future in concurrent.futures.as_completed(futures):
-            region_data = future.result()
-            final_data.extend(region_data)
-
-    for row in final_data:
-        ws.append(row)
+    with concurrent.futures.ThreadPoolExecutor(max_workers=8) as executor:
+        results = executor.map(getResources, getRegions())
+        for region_rows in results:
+            # append to worksheet only if resoruces are found in the region
+            if region_rows:
+                for row in region_rows:
+                    ws.append(row)
 
     wb.save('aws-inventory.xlsx')