diff --git a/.gitignore b/.gitignore
index d36fbb856..5f8e400e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -165,3 +165,4 @@ output.wav
 metagpt/roles/idea_agent.py
 .aider*
 /config/config.yaml
+/tests/metagpt/actions/check_data.py
diff --git a/metagpt/roles/ml_engineer.py b/metagpt/roles/ml_engineer.py
index fe6f81841..08451ec89 100644
--- a/metagpt/roles/ml_engineer.py
+++ b/metagpt/roles/ml_engineer.py
@@ -93,7 +93,7 @@ class MLEngineer(Role):
         summary = await SummarizeAnalysis().run(self.plan)
         rsp = Message(content=summary, cause_by=SummarizeAnalysis)
         self._rc.memory.add(rsp)
-
+        
         return rsp
 
     async def _write_and_exec_code(self, max_retry: int = 3):
diff --git a/metagpt/utils/save_code.py b/metagpt/utils/save_code.py
index b0720a5cf..f1fdf0403 100644
--- a/metagpt/utils/save_code.py
+++ b/metagpt/utils/save_code.py
@@ -5,6 +5,8 @@
 import os
 import json
 
+import nbformat
+
 from metagpt.const import DATA_PATH
 
 def save_code_file(name: str, code_context: str, file_format: str = "py") -> None:
@@ -32,6 +34,8 @@ def save_code_file(name: str, code_context: str, file_format: str = "py") -> Non
         data = {"code": code_context}
         with open(file_path, "w", encoding="utf-8") as fp:
             json.dump(data, fp, indent=2)
+    elif file_format == "ipynb":
+         nbformat.write(code_context, file_path)
     else:
         raise ValueError("Unsupported file format. Please choose 'py' or 'json'.")
 
diff --git a/tests/metagpt/utils/test_save_code.py b/tests/metagpt/utils/test_save_code.py
index 33addb2bf..60a9e1ff4 100644
--- a/tests/metagpt/utils/test_save_code.py
+++ b/tests/metagpt/utils/test_save_code.py
@@ -2,8 +2,13 @@
 # @Date    : 12/12/2023 4:17 PM
 # @Author  : stellahong (stellahong@fuzhi.ai)
 # @Desc    :
+import pytest
 import os
 import json
+import nbformat
+
+from metagpt.actions.write_analysis_code import WriteCodeByGenerate
+from metagpt.actions.execute_code import ExecutePyCode
 
 from metagpt.utils.save_code import save_code_file, DATA_PATH
 
@@ -21,6 +26,7 @@ def test_save_code_file_python():
         content = fp.read()
     assert "print('Hello, World!')" in content, "File content does not match"
 
+
 def test_save_code_file_json():
     save_code_file("example_json", "print('Hello, JSON!')", file_format="json")
     file_path = DATA_PATH / "output" / "example_json" / "code.json"
@@ -28,3 +34,23 @@ def test_save_code_file_json():
         data = json.load(fp)
     assert "code" in data, "JSON key 'code' is missing"
     assert data["code"] == "print('Hello, JSON!')", "JSON content does not match"
+
+
+
+@pytest.mark.asyncio
+async def test_save_code_file_notebook():
+    code = await WriteCodeByGenerate().run(
+        context="basic python, hello world", plan="", code_steps="", temperature=0.0
+    )
+    executor = ExecutePyCode()
+    await executor.run(code)
+    # Save as a Notebook file
+    save_code_file("example_nb", executor.nb, file_format="ipynb")
+    file_path = DATA_PATH / "output" / "example_nb" / "code.ipynb"
+    assert os.path.exists(file_path), f"Notebook file does not exist: {file_path}"
+
+    # Additional checks specific to notebook format
+    notebook = nbformat.read(file_path, as_version=4)
+    assert len(notebook.cells) > 0, "Notebook should have at least one cell"
+    first_cell_source = notebook.cells[0].source
+    assert "print('Hello, World!')" in first_cell_source, "Notebook cell content does not match"