Fix pyright type errors and branch coverage in tests

- Add type: ignore comments for IPython imports (reportMissingImports, etc.)
- Add pragma: no branch for async context manager branches in Jupyter tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: BabyChrist666

src/mcp/client/stdio.py

@@ -37,15 +37,15 @@ def _is_jupyter_environment() -> bool:
     """
     try:
         # Check for IPython kernel
-        from IPython import get_ipython
+        from IPython import get_ipython  # type: ignore[reportMissingImports]
 
-        ipython = get_ipython()
+        ipython = get_ipython()  # type: ignore[reportUnknownVariableType]
         if ipython is not None:
             # Check if it's a notebook kernel (not just IPython terminal)
-            if "IPKernelApp" in ipython.config:
+            if "IPKernelApp" in ipython.config:  # type: ignore[reportUnknownMemberType]
                 return True
             # Also check for ZMQInteractiveShell which indicates notebook
-            if ipython.__class__.__name__ == "ZMQInteractiveShell":
+            if ipython.__class__.__name__ == "ZMQInteractiveShell":  # type: ignore[reportUnknownMemberType]
                 return True
     except (ImportError, AttributeError):
         pass

tests/client/test_stdio.py

@@ -769,7 +769,10 @@ async def test_stderr_reader_jupyter_mode(self):
         # Mock _is_jupyter_environment to return True to exercise stderr_reader
         with patch("mcp.client.stdio._is_jupyter_environment", return_value=True):
             with anyio.move_on_after(5.0) as cancel_scope:
-                async with stdio_client(server_params) as (read_stream, write_stream):
+                async with stdio_client(server_params) as (  # pragma: no branch
+                    read_stream,
+                    write_stream,
+                ):
                     await anyio.sleep(1.0)
 
         assert not cancel_scope.cancelled_caught, "stdio_client should not hang in Jupyter mode"
@@ -798,7 +801,10 @@ async def test_stderr_reader_jupyter_mode_continuous(self):
 
         with patch("mcp.client.stdio._is_jupyter_environment", return_value=True):
             with anyio.move_on_after(5.0) as cancel_scope:
-                async with stdio_client(server_params) as (read_stream, write_stream):
+                async with stdio_client(server_params) as (  # pragma: no branch
+                    read_stream,
+                    write_stream,
+                ):
                     await anyio.sleep(1.0)
 
         assert not cancel_scope.cancelled_caught, "stdio_client should handle continuous Jupyter stderr"