From 3fb089a5b6d97307077abb9bfdcd82753f95d31a Mon Sep 17 00:00:00 2001
From: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
Date: Sat, 26 Apr 2025 07:56:36 -0400
Subject: [PATCH] Use PEP 649 annotations

---
 src/fastmcp/server/server.py | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/src/fastmcp/server/server.py b/src/fastmcp/server/server.py
index b1547292e..65dd33ea4 100644
--- a/src/fastmcp/server/server.py
+++ b/src/fastmcp/server/server.py
@@ -1,5 +1,7 @@
 """FastMCP - A more ergonomic interface for MCP servers."""
 
+from __future__ import annotations
+
 import datetime
 from collections.abc import AsyncIterator, Awaitable, Callable
 from contextlib import (
@@ -63,7 +65,7 @@ class MountedServer:
     def __init__(
         self,
         prefix: str,
-        server: "FastMCP",
+        server: FastMCP,
         tool_separator: str | None = None,
         resource_separator: str | None = None,
         prompt_separator: str | None = None,
@@ -149,7 +151,7 @@ class TimedCache:
 
 
 @asynccontextmanager
-async def default_lifespan(server: "FastMCP") -> AsyncIterator[Any]:
+async def default_lifespan(server: FastMCP) -> AsyncIterator[Any]:
     """Default lifespan context manager that does nothing.
 
     Args:
@@ -162,8 +164,8 @@ async def default_lifespan(server: "FastMCP") -> AsyncIterator[Any]:
 
 
 def _lifespan_wrapper(
-    app: "FastMCP",
-    lifespan: Callable[["FastMCP"], AbstractAsyncContextManager[LifespanResultT]],
+    app: FastMCP,
+    lifespan: Callable[[FastMCP], AbstractAsyncContextManager[LifespanResultT]],
 ) -> Callable[
     [MCPServer[LifespanResultT]], AbstractAsyncContextManager[LifespanResultT]
 ]:
@@ -183,7 +185,7 @@ class FastMCP(Generic[LifespanResultT]):
         instructions: str | None = None,
         lifespan: (
             Callable[
-                ["FastMCP[LifespanResultT]"],
+                [FastMCP[LifespanResultT]],
                 AbstractAsyncContextManager[LifespanResultT],
             ]
             | None
@@ -277,7 +279,7 @@ class FastMCP(Generic[LifespanResultT]):
         self._mcp_server.get_prompt()(self._mcp_get_prompt)
         self._mcp_server.list_resource_templates()(self._mcp_list_resource_templates)
 
-    def get_context(self) -> "Context[ServerSession, LifespanResultT]":
+    def get_context(self) -> Context[ServerSession, LifespanResultT]:
         """
         Returns a Context object. Note that the context will only be valid
         during a request; outside a request, most methods will error.
@@ -770,7 +772,7 @@ class FastMCP(Generic[LifespanResultT]):
     def mount(
         self,
         prefix: str,
-        server: "FastMCP[LifespanResultT]",
+        server: FastMCP[LifespanResultT],
         tool_separator: str | None = None,
         resource_separator: str | None = None,
         prompt_separator: str | None = None,
@@ -795,7 +797,7 @@ class FastMCP(Generic[LifespanResultT]):
     async def import_server(
         self,
         prefix: str,
-        server: "FastMCP[LifespanResultT]",
+        server: FastMCP[LifespanResultT],
         tool_separator: str | None = None,
         resource_separator: str | None = None,
         prompt_separator: str | None = None,
@@ -869,7 +871,7 @@ class FastMCP(Generic[LifespanResultT]):
     @classmethod
     def from_openapi(
         cls, openapi_spec: dict[str, Any], client: httpx.AsyncClient, **settings: Any
-    ) -> "FastMCPOpenAPI":
+    ) -> FastMCPOpenAPI:
         """
         Create a FastMCP server from an OpenAPI specification.
         """
@@ -879,8 +881,8 @@ class FastMCP(Generic[LifespanResultT]):
 
     @classmethod
     def from_fastapi(
-        cls, app: "Any", name: str | None = None, **settings: Any
-    ) -> "FastMCPOpenAPI":
+        cls, app: Any, name: str | None = None, **settings: Any
+    ) -> FastMCPOpenAPI:
         """
         Create a FastMCP server from a FastAPI application.
         """
@@ -898,7 +900,7 @@ class FastMCP(Generic[LifespanResultT]):
         )
 
     @classmethod
-    def from_client(cls, client: "Client", **settings: Any) -> "FastMCPProxy":
+    def from_client(cls, client: Client, **settings: Any) -> FastMCPProxy:
         """
         Create a FastMCP proxy server from a FastMCP client.
         """