fix: resolve CI failures by bumping starlette and fixing linting/formatting

Author: Ashutosh0x

pyproject.toml

@@ -30,7 +30,7 @@ dependencies = [
     "httpx-sse>=0.4",
     "pydantic>=2.12.0",
     "starlette>=0.48.0; python_version >= '3.14'",
-    "starlette>=0.27; python_version < '3.14'",
+    "starlette>=0.40.0; python_version < '3.14'",
     "python-multipart>=0.0.9",
     "sse-starlette>=1.6.1",
     "pydantic-settings>=2.5.2",

scripts/update_readme_snippets.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 """Update README.md with live code snippets from example files.
 
 This script finds specially marked code blocks in README.md and updates them
@@ -9,6 +8,8 @@
     python scripts/update_readme_snippets.py --check  # Check mode for CI
 """
 
+from __future__ import annotations
+
 import argparse
 import re
 import sys

src/mcp/server/mcpserver/server.py

@@ -869,7 +869,6 @@ async def handle_sse(scope: Scope, receive: Receive, send: Send):  # pragma: no
         else:
             # Auth is disabled, no need for RequireAuthMiddleware
 
-
             # Use an ASGI-compatible wrapper to avoid Starlette's high-level route wrapping
             # which expects a Response object and causes double-sending.
             class HandleSseAsgi:

src/mcp/shared/jupyter.py

@@ -1,14 +1,12 @@
-
-
 def is_jupyter() -> bool:
     """Check if we are running in a Jupyter notebook environment."""
     try:
-        shell = get_ipython().__class__.__name__ # type: ignore
-        if shell == 'ZMQInteractiveShell':
-            return True   # Jupyter notebook or qtconsole
-        elif shell == 'TerminalInteractiveShell':
+        shell = get_ipython().__class__.__name__  # type: ignore
+        if shell == "ZMQInteractiveShell":
+            return True  # Jupyter notebook or qtconsole
+        elif shell == "TerminalInteractiveShell":
             return False  # Terminal running IPython
         else:
             return False  # Other type (?)
     except NameError:
-        return False      # Probably standard Python interpreter
+        return False  # Probably standard Python interpreter

tests/issues/test_883_middleware.py

@@ -44,11 +44,10 @@ def test_883_middleware_post_accepted():
     client = TestClient(app)
 
     # POST to /messages/ (with invalid session, but should not AssertionError)
-    response = client.post("/messages/?session_id=00000000000000000000000000000000", json={
-        "jsonrpc": "2.0",
-        "method": "notifications/initialized",
-        "params": {}
-    })
+    response = client.post(
+        "/messages/?session_id=00000000000000000000000000000000",
+        json={"jsonrpc": "2.0", "method": "notifications/initialized", "params": {}},
+    )
 
     # 404 is expected here as we didn't establish a real session
     assert response.status_code == 404