refactor: move inline imports to module level (#1893)

tests/client/test_stdio.py

@@ -10,7 +10,12 @@ import anyio
 import pytest
 
 from mcp.client.session import ClientSession
-from mcp.client.stdio import StdioServerParameters, _create_platform_compatible_process, stdio_client
+from mcp.client.stdio import (
+    StdioServerParameters,
+    _create_platform_compatible_process,
+    _terminate_process_tree,
+    stdio_client,
+)
 from mcp.shared.exceptions import McpError
 from mcp.shared.message import SessionMessage
 from mcp.types import CONNECTION_CLOSED, JSONRPCMessage, JSONRPCRequest, JSONRPCResponse
@@ -312,8 +317,6 @@ class TestChildProcessCleanup:
 
             # Terminate using our function
             print("Terminating process and children...")
-            from mcp.client.stdio import _terminate_process_tree
-
             await _terminate_process_tree(proc)
 
             # Verify processes stopped
@@ -413,8 +416,6 @@ class TestChildProcessCleanup:
                     assert new_size > initial_size, f"{name} process should be writing"
 
             # Terminate the whole tree
-            from mcp.client.stdio import _terminate_process_tree
-
             await _terminate_process_tree(proc)
 
             # Verify all stopped
@@ -494,8 +495,6 @@ class TestChildProcessCleanup:
                 assert size2 > size1, "Child should be writing"
 
             # Terminate - this will kill the process group even if parent exits first
-            from mcp.client.stdio import _terminate_process_tree
-
             await _terminate_process_tree(proc)
 
             # Verify child stopped