Refactor code for consistency and readability

- Standardized string quotes across multiple files to use double quotes for consistency.
- Improved formatting of JSON dumps in mock data for better readability.
- Enhanced the structure of various functions and data definitions for clarity.
- Updated test cases to reflect changes in data structure and ensure accuracy.

dashboard/tests/test_audits.py

@@ -1,4 +1,5 @@
 """Tests for dashboard.openstack_utils.audits."""
+
 from unittest.mock import MagicMock, patch
 
 from django.test import TestCase
@@ -31,8 +32,10 @@ class ConvertCpuDataTest(TestCase):
         self.assertEqual(len(hosts), 2)
         self.assertIn("compute-0", hosts)
         self.assertIn("compute-1", hosts)
-        # compute-0: (10+20)/2 for ts 1000 and 5 for ts 1000 -> groupby host,timestamp sum -> then groupby host mean
-        # For compute-0: two timestamps 1000 (10+5=15) and 1001 (20). Mean over timestamps = (15+20)/2 = 17.5
+        # compute-0: (10+20)/2 for ts 1000 and 5 for ts 1000 -> groupby host,timestamp sum
+        # -> then groupby host mean
+        # For compute-0: two timestamps 1000 (10+5=15) and 1001 (20).
+        # Mean over timestamps = (15+20)/2 = 17.5
         # For compute-1: one value 30
         by_host = result.set_index("host")["cpu_usage"]
         self.assertAlmostEqual(by_host["compute-0"], 17.5)
@@ -60,11 +63,14 @@ class GetCurrentClusterCpuTest(TestCase):
     @patch("dashboard.openstack_utils.audits.query_prometheus")
     def test_returns_host_labels_and_cpu_current(self, mock_query, mock_convert):
         import pandas as pd
+
         mock_query.return_value = [{"metric": {"host": "h0"}, "values": [[0, "1.0"]]}]
-        mock_convert.return_value = pd.DataFrame({
-            "host": ["compute-0", "compute-1"],
-            "cpu_usage": [25.0, 35.0],
-        })
+        mock_convert.return_value = pd.DataFrame(
+            {
+                "host": ["compute-0", "compute-1"],
+                "cpu_usage": [25.0, 35.0],
+            }
+        )
         conn = MagicMock()
         result = get_current_cluster_cpu(conn)
         self.assertEqual(result["host_labels"], ["compute-0", "compute-1"])