fix(prometheus): remove dead prometheus_label_factory call; apply Black

async_post_call_failure_hook passed only supported_enum_labels to
prometheus_label_factory; enum_values is required. The call was unused
because _inc_labeled_counter builds labels internally.

Reformat Prometheus-related modules and passthrough/copilot helpers for CI.

Made-with: Cursor

litellm/integrations/prometheus.py

@@ -51,6 +51,7 @@ if TYPE_CHECKING:
 else:
     AsyncIOScheduler = Any
 
+
 class PrometheusLogger(CustomLogger):
     # Class variables or attributes
 
@@ -991,9 +992,7 @@ class PrometheusLogger(CustomLogger):
         amount: float = 1.0,
     ) -> None:
         _labels = prometheus_label_factory(
-            supported_enum_labels=self.get_labels_for_metric(
-                metric_name=metric_name
-            ),
+            supported_enum_labels=self.get_labels_for_metric(metric_name=metric_name),
             enum_values=enum_values,
             label_context=label_context,
         )
@@ -1118,7 +1117,9 @@ class PrometheusLogger(CustomLogger):
 
             user_api_key = hash_token(user_api_key)
 
-        label_context = PrometheusLabelFactoryContext(enum_values) #amortized per request.
+        label_context = PrometheusLabelFactoryContext(
+            enum_values
+        )  # amortized per request.
 
         # increment total LLM requests and spend metric
         self._increment_top_level_request_and_spend_metrics(
@@ -1791,11 +1792,6 @@ class PrometheusLogger(CustomLogger):
                     else None
                 ),
             )
-            _labels = prometheus_label_factory(
-                supported_enum_labels=self.get_labels_for_metric(
-                    metric_name="litellm_proxy_failed_requests_metric"
-                ),
-            )
             _label_ctx = PrometheusLabelFactoryContext(enum_values)
             PrometheusLogger._inc_labeled_counter(
                 self,
@@ -3495,7 +3491,9 @@ def _prometheus_labels_from_context(
     }
 
     if UserAPIKeyLabelNames.END_USER.value in filtered_labels:
-        filtered_labels[UserAPIKeyLabelNames.END_USER.value] = ctx.get_resolved_end_user()
+        filtered_labels[UserAPIKeyLabelNames.END_USER.value] = (
+            ctx.get_resolved_end_user()
+        )
 
     for sk, val in ctx._custom_by_sanitized_key.items():
         if sk in supported_enum_labels:

litellm/integrations/prometheus_helpers.py

@@ -51,8 +51,7 @@ class PrometheusLabelFactoryContext:
         self.enum_values = enum_values
         enum_dict = enum_values.model_dump()
         self._sanitized_enum: Dict[str, Optional[str]] = {
-            k: _sanitize_prometheus_label_value(v)
-            for k, v in enum_dict.items()
+            k: _sanitize_prometheus_label_value(v) for k, v in enum_dict.items()
         }
         self._custom_by_sanitized_key: Dict[str, Optional[str]] = {}
         if enum_values.custom_metadata_labels is not None:

litellm/llms/github_copilot/authenticator.py

@@ -294,9 +294,7 @@ class Authenticator:
         access_token_url = os.getenv(
             "GITHUB_COPILOT_ACCESS_TOKEN_URL", DEFAULT_GITHUB_ACCESS_TOKEN_URL
         )
-        client_id = os.getenv(
-            "GITHUB_COPILOT_CLIENT_ID", DEFAULT_GITHUB_CLIENT_ID
-        )
+        client_id = os.getenv("GITHUB_COPILOT_CLIENT_ID", DEFAULT_GITHUB_CLIENT_ID)
 
         for attempt in range(max_attempts):
             try:

litellm/passthrough/utils.py

@@ -79,7 +79,9 @@ class BasePassthroughUtils:
         for header_name, header_value in request_headers.items():
             if header_name.lower().startswith(PASS_THROUGH_HEADER_PREFIX):
                 # Strip the 'x-pass-' prefix and normalize to lowercase
-                actual_header_name = header_name[len(PASS_THROUGH_HEADER_PREFIX) :].lower()
+                actual_header_name = header_name[
+                    len(PASS_THROUGH_HEADER_PREFIX) :
+                ].lower()
                 if actual_header_name in _PASS_THROUGH_PROTECTED_HEADERS or any(
                     actual_header_name.startswith(p)
                     for p in _PASS_THROUGH_PROTECTED_HEADER_PREFIXES

litellm/types/integrations/prometheus.py

@@ -784,7 +784,7 @@ class UserAPIKeyLabelValues:
     org_id: Optional[str] = None
     org_alias: Optional[str] = None
 
-    #Added for test compatibility.
+    # Added for test compatibility.
     def __init__(self, **kwargs: Any) -> None:
         """
         Match former Pydantic behavior: unknown keys are ignored; ``api_key_hash`` maps to