style: format adapters/llm.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

adapters/llm.py

@@ -60,7 +60,7 @@ def _sse_data_payload(raw: str) -> str | None:
     line = raw.strip()
     if not line or line.startswith(":") or not line.startswith("data:"):
         return None
-    return line[len("data:"):].strip()
+    return line[len("data:") :].strip()
 
 
 def _sse_delta(chunk: dict, usage_sink: dict) -> tuple[bool, str] | None:
@@ -292,9 +292,7 @@ class GovernedLLMClient:
 
         # ① 熔断器检查
         if self._breaker.is_open(self._provider, time.monotonic()):
-            raise CircuitOpenError(
-                f"熔断器已开启，拒绝调用 provider={self._provider}"
-            )
+            raise CircuitOpenError(f"熔断器已开启，拒绝调用 provider={self._provider}")
 
         # ② 缓存查询
         cached = await self._cache.get(self._model, messages)
@@ -337,8 +335,8 @@ class GovernedLLMClient:
             attempt_start = time.monotonic()
             try:
                 sse_lines = await self._stream_request(messages)
-                content, thinking_text, ttft_ms, max_itoken_ms, usage = (
-                    await self._consume_stream(sse_lines)
+                content, thinking_text, ttft_ms, max_itoken_ms, usage = await self._consume_stream(
+                    sse_lines
                 )
 
                 # 熔断器记成功
@@ -449,7 +447,7 @@ class GovernedLLMClient:
                     )
                     if attempt < self._max_retries - 1:
                         delay = min(
-                            self._retry_base_delay_s * (2 ** attempt),
+                            self._retry_base_delay_s * (2**attempt),
                             self._retry_max_delay_s,
                         )
                         if delay > 0:
@@ -480,9 +478,7 @@ class GovernedLLMClient:
         assert last_exc is not None
         raise last_exc
 
-    async def _stream_request(
-        self, messages: list[dict[str, Any]]
-    ) -> list[str]:
+    async def _stream_request(self, messages: list[dict[str, Any]]) -> list[str]:
         """发起流式 HTTP 请求并收集全部 SSE 行。
 
         此方法为主要的 HTTP 交互点，测试通过 patch 替换以注入假 SSE 行。
@@ -507,9 +503,7 @@ class GovernedLLMClient:
             payload.update(_build_thinking_body(self._provider))
 
         collected_lines: list[str] = []
-        async with self._http.stream(
-            "POST", "/chat/completions", json=payload
-        ) as resp:
+        async with self._http.stream("POST", "/chat/completions", json=payload) as resp:
             if resp.status_code >= 400:
                 await resp.aread()
                 resp.raise_for_status()