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/views.py

@@ -5,23 +5,32 @@ from django.conf import settings
 from django.core.cache import cache
 from django.http import JsonResponse
 from django.shortcuts import render
+
+from dashboard.mock_data import get_mock_context
+from dashboard.openstack_utils.audits import get_audits, get_current_cluster_cpu
 from dashboard.openstack_utils.connect import check_openstack, get_connection
 from dashboard.openstack_utils.flavor import get_flavor_list
 from dashboard.prometheus_utils.query import check_prometheus, query_prometheus
-from dashboard.openstack_utils.audits import get_audits, get_current_cluster_cpu
-from dashboard.mock_data import get_mock_context
 
 # Prometheus queries run in parallel (query_key -> query string)
 _PROMETHEUS_QUERIES = {
     "hosts_total": "count(node_exporter_build_info{job='node_exporter_compute'})",
-    "pcpu_total": "sum(count(node_cpu_seconds_total{job='node_exporter_compute', mode='idle'}) without (cpu,mode))",
+    "pcpu_total": (
+        "sum(count(node_cpu_seconds_total{job='node_exporter_compute', mode='idle'}) "
+        "without (cpu,mode))"
+    ),
     "pcpu_usage": "sum(node_load5{job='node_exporter_compute'})",
     "vcpu_allocated": "sum(libvirt_domain_info_virtual_cpus)",
-    "vcpu_overcommit_max": "avg(openstack_placement_resource_allocation_ratio{resourcetype='VCPU'})",
+    "vcpu_overcommit_max": (
+        "avg(openstack_placement_resource_allocation_ratio{resourcetype='VCPU'})"
+    ),
     "pram_total": "sum(node_memory_MemTotal_bytes{job='node_exporter_compute'})",
     "pram_usage": "sum(node_memory_Active_bytes{job='node_exporter_compute'})",
     "vram_allocated": "sum(libvirt_domain_info_maximum_memory_bytes)",
-    "vram_overcommit_max": "avg(avg_over_time(openstack_placement_resource_allocation_ratio{resourcetype='MEMORY_MB'}[5m]))",
+    "vram_overcommit_max": (
+        "avg(avg_over_time("
+        "openstack_placement_resource_allocation_ratio{resourcetype='MEMORY_MB'}[5m]))"
+    ),
     "vm_count": "sum(libvirt_domain_state_code)",
     "vm_active": "sum(libvirt_domain_state_code{stateDesc='the domain is running'})",
 }
@@ -44,7 +53,9 @@ def _fetch_prometheus_metrics():
                 else:
                     result[key] = int(raw)
             except (ValueError, TypeError):
-                result[key] = 0 if key in ("pcpu_usage", "vcpu_overcommit_max", "vram_overcommit_max") else 0
+                result[key] = (
+                    0 if key in ("pcpu_usage", "vcpu_overcommit_max", "vram_overcommit_max") else 0
+                )
     return result
 
 
@@ -221,8 +232,22 @@ def _skeleton_context():
         "region": {"name": "—", "hosts_total": 0},
         "pcpu": {"total": 0, "usage": 0, "free": 0, "used_percentage": 0},
         "pram": {"total": 0, "usage": 0, "free": 0, "used_percentage": 0},
-        "vcpu": {"total": 0, "allocated": 0, "free": 0, "allocated_percentage": 0, "overcommit_ratio": 0, "overcommit_max": 0},
-        "vram": {"total": 0, "allocated": 0, "free": 0, "allocated_percentage": 0, "overcommit_ratio": 0, "overcommit_max": 0},
+        "vcpu": {
+            "total": 0,
+            "allocated": 0,
+            "free": 0,
+            "allocated_percentage": 0,
+            "overcommit_ratio": 0,
+            "overcommit_max": 0,
+        },
+        "vram": {
+            "total": 0,
+            "allocated": 0,
+            "free": 0,
+            "allocated_percentage": 0,
+            "overcommit_ratio": 0,
+            "overcommit_max": 0,
+        },
         "vm": {"count": 0, "active": 0, "stopped": 0, "avg_cpu": 0, "avg_ram": 0, "density": 0},
         "flavors": empty_flavors,
         "audits": [],
@@ -270,10 +295,12 @@ def api_audits(request):
 def api_source_status(request):
     """Return status of Prometheus and OpenStack data sources (ok / error / mock)."""
     if getattr(settings, "USE_MOCK_DATA", False):
-        return JsonResponse({
-            "prometheus": {"status": "mock"},
-            "openstack": {"status": "mock"},
-        })
+        return JsonResponse(
+            {
+                "prometheus": {"status": "mock"},
+                "openstack": {"status": "mock"},
+            }
+        )
 
     cache_key = "dashboard_source_status"
     cache_ttl = getattr(settings, "SOURCE_STATUS_CACHE_TTL", 30)
@@ -284,4 +311,4 @@ def api_source_status(request):
             "openstack": check_openstack(),
         }
         cache.set(cache_key, data, timeout=cache_ttl)
-    return JsonResponse(data)
+    return JsonResponse(data)