Use 120 characters instead of 88 (#856)

Author: Kludex

examples/fastmcp/memory.py

@@ -47,18 +47,14 @@
 
 DB_DSN = "postgresql://postgres:postgres@localhost:54320/memory_db"
 # reset memory with rm ~/.fastmcp/{USER}/memory/*
-PROFILE_DIR = (
-    Path.home() / ".fastmcp" / os.environ.get("USER", "anon") / "memory"
-).resolve()
+PROFILE_DIR = (Path.home() / ".fastmcp" / os.environ.get("USER", "anon") / "memory").resolve()
 PROFILE_DIR.mkdir(parents=True, exist_ok=True)
 
 
 def cosine_similarity(a: list[float], b: list[float]) -> float:
     a_array = np.array(a, dtype=np.float64)
     b_array = np.array(b, dtype=np.float64)
-    return np.dot(a_array, b_array) / (
-        np.linalg.norm(a_array) * np.linalg.norm(b_array)
-    )
+    return np.dot(a_array, b_array) / (np.linalg.norm(a_array) * np.linalg.norm(b_array))
 
 
 async def do_ai[T](
@@ -97,9 +93,7 @@ class MemoryNode(BaseModel):
     summary: str = ""
     importance: float = 1.0
     access_count: int = 0
-    timestamp: float = Field(
-        default_factory=lambda: datetime.now(timezone.utc).timestamp()
-    )
+    timestamp: float = Field(default_factory=lambda: datetime.now(timezone.utc).timestamp())
     embedding: list[float]
 
     @classmethod
@@ -152,9 +146,7 @@ async def merge_with(self, other: Self, deps: Deps):
         self.importance += other.importance
         self.access_count += other.access_count
         self.embedding = [(a + b) / 2 for a, b in zip(self.embedding, other.embedding)]
-        self.summary = await do_ai(
-            self.content, "Summarize the following text concisely.", str, deps
-        )
+        self.summary = await do_ai(self.content, "Summarize the following text concisely.", str, deps)
         await self.save(deps)
         # Delete the merged node from the database
         if other.id is not None:
@@ -221,9 +213,7 @@ async def find_similar_memories(embedding: list[float], deps: Deps) -> list[Memo
 
 async def update_importance(user_embedding: list[float], deps: Deps):
     async with deps.pool.acquire() as conn:
-        rows = await conn.fetch(
-            "SELECT id, importance, access_count, embedding FROM memories"
-        )
+        rows = await conn.fetch("SELECT id, importance, access_count, embedding FROM memories")
         for row in rows:
             memory_embedding = row["embedding"]
             similarity = cosine_similarity(user_embedding, memory_embedding)
@@ -273,25 +263,19 @@ async def display_memory_tree(deps: Deps) -> str:
         )
     result = ""
     for row in rows:
-        effective_importance = row["importance"] * (
-            1 + math.log(row["access_count"] + 1)
-        )
+        effective_importance = row["importance"] * (1 + math.log(row["access_count"] + 1))
         summary = row["summary"] or row["content"]
         result += f"- {summary} (Importance: {effective_importance:.2f})\n"
     return result
 
 
 @mcp.tool()
 async def remember(
-    contents: list[str] = Field(
-        description="List of observations or memories to store"
-    ),
+    contents: list[str] = Field(description="List of observations or memories to store"),
 ):
     deps = Deps(openai=AsyncOpenAI(), pool=await get_db_pool())
     try:
-        return "\n".join(
-            await asyncio.gather(*[add_memory(content, deps) for content in contents])
-        )
+        return "\n".join(await asyncio.gather(*[add_memory(content, deps) for content in contents]))
     finally:
         await deps.pool.close()
 
@@ -305,9 +289,7 @@ async def read_profile() -> str:
 
 
 async def initialize_database():
-    pool = await asyncpg.create_pool(
-        "postgresql://postgres:postgres@localhost:54320/postgres"
-    )
+    pool = await asyncpg.create_pool("postgresql://postgres:postgres@localhost:54320/postgres")
     try:
         async with pool.acquire() as conn:
             await conn.execute("""

examples/fastmcp/text_me.py

@@ -28,15 +28,11 @@
 
 
 class SurgeSettings(BaseSettings):
-    model_config: SettingsConfigDict = SettingsConfigDict(
-        env_prefix="SURGE_", env_file=".env"
-    )
+    model_config: SettingsConfigDict = SettingsConfigDict(env_prefix="SURGE_", env_file=".env")
 
     api_key: str
     account_id: str
-    my_phone_number: Annotated[
-        str, BeforeValidator(lambda v: "+" + v if not v.startswith("+") else v)
-    ]
+    my_phone_number: Annotated[str, BeforeValidator(lambda v: "+" + v if not v.startswith("+") else v)]
     my_first_name: str
     my_last_name: str
 

examples/fastmcp/unicode_example.py

@@ -8,10 +8,7 @@
 mcp = FastMCP()
 
 
-@mcp.tool(
-    description="🌟 A tool that uses various Unicode characters in its description: "
-    "á é í ó ú ñ 漢字 🎉"
-)
+@mcp.tool(description="🌟 A tool that uses various Unicode characters in its description: " "á é í ó ú ñ 漢字 🎉")
 def hello_unicode(name: str = "世界", greeting: str = "¡Hola") -> str:
     """
     A simple tool that demonstrates Unicode handling in:

examples/servers/simple-auth/mcp_simple_auth/server.py

@@ -82,19 +82,15 @@ async def register_client(self, client_info: OAuthClientInformationFull):
         """Register a new OAuth client."""
         self.clients[client_info.client_id] = client_info
 
-    async def authorize(
-        self, client: OAuthClientInformationFull, params: AuthorizationParams
-    ) -> str:
+    async def authorize(self, client: OAuthClientInformationFull, params: AuthorizationParams) -> str:
         """Generate an authorization URL for GitHub OAuth flow."""
         state = params.state or secrets.token_hex(16)
 
         # Store the state mapping
         self.state_mapping[state] = {
             "redirect_uri": str(params.redirect_uri),
             "code_challenge": params.code_challenge,
-            "redirect_uri_provided_explicitly": str(
-                params.redirect_uri_provided_explicitly
-            ),
+            "redirect_uri_provided_explicitly": str(params.redirect_uri_provided_explicitly),
             "client_id": client.client_id,
         }
 
@@ -117,9 +113,7 @@ async def handle_github_callback(self, code: str, state: str) -> str:
 
         redirect_uri = state_data["redirect_uri"]
         code_challenge = state_data["code_challenge"]
-        redirect_uri_provided_explicitly = (
-            state_data["redirect_uri_provided_explicitly"] == "True"
-        )
+        redirect_uri_provided_explicitly = state_data["redirect_uri_provided_explicitly"] == "True"
         client_id = state_data["client_id"]
 
         # Exchange code for token with GitHub
@@ -200,8 +194,7 @@ async def exchange_authorization_code(
                 for token, data in self.tokens.items()
                 # see https://github.blog/engineering/platform-security/behind-githubs-new-authentication-token-formats/
                 # which you get depends on your GH app setup.
-                if (token.startswith("ghu_") or token.startswith("gho_"))
-                and data.client_id == client.client_id
+                if (token.startswith("ghu_") or token.startswith("gho_")) and data.client_id == client.client_id
             ),
             None,
         )
@@ -232,9 +225,7 @@ async def load_access_token(self, token: str) -> AccessToken | None:
 
         return access_token
 
-    async def load_refresh_token(
-        self, client: OAuthClientInformationFull, refresh_token: str
-    ) -> RefreshToken | None:
+    async def load_refresh_token(self, client: OAuthClientInformationFull, refresh_token: str) -> RefreshToken | None:
         """Load a refresh token - not supported."""
         return None
 
@@ -247,9 +238,7 @@ async def exchange_refresh_token(
         """Exchange refresh token"""
         raise NotImplementedError("Not supported")
 
-    async def revoke_token(
-        self, token: str, token_type_hint: str | None = None
-    ) -> None:
+    async def revoke_token(self, token: str, token_type_hint: str | None = None) -> None:
         """Revoke a token."""
         if token in self.tokens:
             del self.tokens[token]
@@ -335,9 +324,7 @@ async def get_user_profile() -> dict[str, Any]:
             )
 
             if response.status_code != 200:
-                raise ValueError(
-                    f"GitHub API error: {response.status_code} - {response.text}"
-                )
+                raise ValueError(f"GitHub API error: {response.status_code} - {response.text}")
 
             return response.json()
 
@@ -361,9 +348,7 @@ def main(port: int, host: str, transport: Literal["sse", "streamable-http"]) ->
         # No hardcoded credentials - all from environment variables
         settings = ServerSettings(host=host, port=port)
     except ValueError as e:
-        logger.error(
-            "Failed to load settings. Make sure environment variables are set:"
-        )
+        logger.error("Failed to load settings. Make sure environment variables are set:")
         logger.error("  MCP_GITHUB_GITHUB_CLIENT_ID=<your-client-id>")
         logger.error("  MCP_GITHUB_GITHUB_CLIENT_SECRET=<your-client-secret>")
         logger.error(f"Error: {e}")

pyproject.toml

@@ -96,7 +96,7 @@ select = ["C4", "E", "F", "I", "PERF", "UP"]
 ignore = ["PERF203"]
 
 [tool.ruff]
-line-length = 88
+line-length = 120
 target-version = "py310"
 
 [tool.ruff.lint.per-file-ignores]

src/mcp/cli/claude.py

@@ -21,9 +21,7 @@ def get_claude_config_path() -> Path | None:
     elif sys.platform == "darwin":
         path = Path(Path.home(), "Library", "Application Support", "Claude")
     elif sys.platform.startswith("linux"):
-        path = Path(
-            os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config"), "Claude"
-        )
+        path = Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config"), "Claude")
     else:
         return None
 
@@ -37,8 +35,7 @@ def get_uv_path() -> str:
     uv_path = shutil.which("uv")
     if not uv_path:
         logger.error(
-            "uv executable not found in PATH, falling back to 'uv'. "
-            "Please ensure uv is installed and in your PATH"
+            "uv executable not found in PATH, falling back to 'uv'. " "Please ensure uv is installed and in your PATH"
         )
         return "uv"  # Fall back to just "uv" if not found
     return uv_path
@@ -94,10 +91,7 @@ def update_claude_config(
             config["mcpServers"] = {}
 
         # Always preserve existing env vars and merge with new ones
-        if (
-            server_name in config["mcpServers"]
-            and "env" in config["mcpServers"][server_name]
-        ):
+        if server_name in config["mcpServers"] and "env" in config["mcpServers"][server_name]:
             existing_env = config["mcpServers"][server_name]["env"]
             if env_vars:
                 # New vars take precedence over existing ones

src/mcp/cli/cli.py

@@ -45,9 +45,7 @@ def _get_npx_command():
         # Try both npx.cmd and npx.exe on Windows
         for cmd in ["npx.cmd", "npx.exe", "npx"]:
             try:
-                subprocess.run(
-                    [cmd, "--version"], check=True, capture_output=True, shell=True
-                )
+                subprocess.run([cmd, "--version"], check=True, capture_output=True, shell=True)
                 return cmd
             except subprocess.CalledProcessError:
                 continue
@@ -58,9 +56,7 @@ def _get_npx_command():
 def _parse_env_var(env_var: str) -> tuple[str, str]:
     """Parse environment variable string in format KEY=VALUE."""
     if "=" not in env_var:
-        logger.error(
-            f"Invalid environment variable format: {env_var}. Must be KEY=VALUE"
-        )
+        logger.error(f"Invalid environment variable format: {env_var}. Must be KEY=VALUE")
         sys.exit(1)
     key, value = env_var.split("=", 1)
     return key.strip(), value.strip()
@@ -154,14 +150,10 @@ def _check_server_object(server_object: Any, object_name: str):
             True if it's supported.
         """
         if not isinstance(server_object, FastMCP):
-            logger.error(
-                f"The server object {object_name} is of type "
-                f"{type(server_object)} (expecting {FastMCP})."
-            )
+            logger.error(f"The server object {object_name} is of type " f"{type(server_object)} (expecting {FastMCP}).")
             if isinstance(server_object, LowLevelServer):
                 logger.warning(
-                    "Note that only FastMCP server is supported. Low level "
-                    "Server class is not yet supported."
+                    "Note that only FastMCP server is supported. Low level " "Server class is not yet supported."
                 )
             return False
         return True
@@ -172,10 +164,7 @@ def _check_server_object(server_object: Any, object_name: str):
         for name in ["mcp", "server", "app"]:
             if hasattr(module, name):
                 if not _check_server_object(getattr(module, name), f"{file}:{name}"):
-                    logger.error(
-                        f"Ignoring object '{file}:{name}' as it's not a valid "
-                        "server object"
-                    )
+                    logger.error(f"Ignoring object '{file}:{name}' as it's not a valid " "server object")
                     continue
                 return getattr(module, name)
 
@@ -280,8 +269,7 @@ def dev(
         npx_cmd = _get_npx_command()
         if not npx_cmd:
             logger.error(
-                "npx not found. Please ensure Node.js and npm are properly installed "
-                "and added to your system PATH."
+                "npx not found. Please ensure Node.js and npm are properly installed " "and added to your system PATH."
             )
             sys.exit(1)
 
@@ -383,8 +371,7 @@ def install(
         typer.Option(
             "--name",
             "-n",
-            help="Custom name for the server (defaults to server's name attribute or"
-            " file name)",
+            help="Custom name for the server (defaults to server's name attribute or" " file name)",
         ),
     ] = None,
     with_editable: Annotated[
@@ -458,8 +445,7 @@ def install(
             name = server.name
         except (ImportError, ModuleNotFoundError) as e:
             logger.debug(
-                "Could not import server (likely missing dependencies), using file"
-                " name",
+                "Could not import server (likely missing dependencies), using file" " name",
                 extra={"error": str(e)},
             )
             name = file.stem
@@ -477,11 +463,7 @@ def install(
         if env_file:
             if dotenv:
                 try:
-                    env_dict |= {
-                        k: v
-                        for k, v in dotenv.dotenv_values(env_file).items()
-                        if v is not None
-                    }
+                    env_dict |= {k: v for k, v in dotenv.dotenv_values(env_file).items() if v is not None}
                 except Exception as e:
                     logger.error(f"Failed to load .env file: {e}")
                     sys.exit(1)

src/mcp/client/__main__.py

@@ -24,9 +24,7 @@
 
 
 async def message_handler(
-    message: RequestResponder[types.ServerRequest, types.ClientResult]
-    | types.ServerNotification
-    | Exception,
+    message: RequestResponder[types.ServerRequest, types.ClientResult] | types.ServerNotification | Exception,
 ) -> None:
     if isinstance(message, Exception):
         logger.error("Error: %s", message)
@@ -60,9 +58,7 @@ async def main(command_or_url: str, args: list[str], env: list[tuple[str, str]])
             await run_session(*streams)
     else:
         # Use stdio client for commands
-        server_parameters = StdioServerParameters(
-            command=command_or_url, args=args, env=env_dict
-        )
+        server_parameters = StdioServerParameters(command=command_or_url, args=args, env=env_dict)
         async with stdio_client(server_parameters) as streams:
             await run_session(*streams)