distinguish between import and package name in error (#28)

src/cleanlab_codex/codex_tool.py

@@ -126,7 +126,7 @@ def to_smolagents_tool(self) -> Any:
         try:
             from cleanlab_codex.utils.smolagents import CodexTool as SmolagentsCodexTool
         except ImportError as e:
-            raise MissingDependencyError("smolagents", "https://github.com/huggingface/smolagents") from e
+            raise MissingDependencyError(e.name or "smolagents", "https://github.com/huggingface/smolagents") from e
 
         return SmolagentsCodexTool(
             query=self.query,
@@ -145,8 +145,9 @@ def to_llamaindex_tool(self) -> Any:
 
         except ImportError as e:
             raise MissingDependencyError(
-                "llama-index-core",
-                "https://docs.llamaindex.ai/en/stable/getting_started/installation/",
+                import_name=e.name or "llama_index",
+                package_name="llama-index-core",
+                package_url="https://docs.llamaindex.ai/en/stable/getting_started/installation/",
             ) from e
 
         return FunctionTool.from_defaults(
@@ -165,7 +166,11 @@ def to_langchain_tool(self) -> Any:
             from langchain_core.tools.structured import StructuredTool
 
         except ImportError as e:
-            raise MissingDependencyError("langchain", "https://pypi.org/project/langchain/") from e
+            raise MissingDependencyError(
+                import_name=e.name or "langchain",
+                package_name="langchain",
+                package_url="https://pypi.org/project/langchain/",
+            ) from e
 
         return StructuredTool.from_function(
             func=self.query,

src/cleanlab_codex/utils/errors.py

@@ -4,12 +4,19 @@
 class MissingDependencyError(Exception):
     """Raised when a lazy import is missing."""
 
-    def __init__(self, import_name: str, package_url: str | None = None) -> None:
+    def __init__(self, import_name: str, package_name: str | None = None, package_url: str | None = None) -> None:
+        """
+        Args:
+            import_name: The name of the import that failed.
+            package_name: The name of the package to install.
+            package_url: The URL for more information about the package.
+        """
         self.import_name = import_name
+        self.package_name = package_name
         self.package_url = package_url
 
     def __str__(self) -> str:
-        message = f"Failed to import {self.import_name}. Please install the package using `pip install {self.import_name}` and try again."
+        message = f"Failed to import {self.import_name}. Please install the package using `pip install {self.package_name or self.import_name}` and try again."
         if self.package_url:
             message += f" For more information, see {self.package_url}."
         return message

tests/test_codex_tool.py

@@ -1,11 +1,24 @@
+import builtins
+import importlib
 import sys
+from typing import Any
 from unittest.mock import MagicMock, patch
 
 import pytest
 from langchain_core.tools.structured import StructuredTool
 from llama_index.core.tools import FunctionTool
 
 from cleanlab_codex.codex_tool import CodexTool
+from cleanlab_codex.utils.errors import MissingDependencyError
+
+
+def patch_import_with_import_error(missing_module: str) -> None:
+    def custom_import(name: str, *args: Any, **kwargs: Any) -> Any:
+        if name.startswith(missing_module):
+            raise ImportError("test", name=missing_module)
+        return importlib.__import__(name, *args, **kwargs)
+
+    builtins.__import__ = custom_import
 
 
 def test_to_openai_tool(mock_client_from_access_key: MagicMock) -> None:
@@ -32,6 +45,20 @@ def test_to_llamaindex_tool(mock_client_from_access_key: MagicMock) -> None:
         assert llama_index_tool.fn == tool.query
 
 
+def test_to_llamaindex_tool_import_error(
+    mock_client_from_access_key: MagicMock,
+) -> None:
+    with patch("cleanlab_codex.codex_tool.Project") as mock_project:
+        mock_project.from_access_key.return_value = MagicMock(client=mock_client_from_access_key, id="test_project_id")
+
+        tool = CodexTool.from_access_key("sk-test-123")
+        patch_import_with_import_error("llama_index")
+        with pytest.raises(MissingDependencyError) as exc_info:
+            tool.to_llamaindex_tool()
+
+        assert exc_info.value.import_name == "llama_index"
+
+
 def test_to_langchain_tool(mock_client_from_access_key: MagicMock) -> None:
     with patch("cleanlab_codex.codex_tool.Project") as mock_project:
         mock_project.from_access_key.return_value = MagicMock(client=mock_client_from_access_key, id="test_project_id")
@@ -50,6 +77,18 @@ def test_to_langchain_tool(mock_client_from_access_key: MagicMock) -> None:
         ), f"Expected description '{tool.tool_description}', got '{langchain_tool.description}'."
 
 
+def test_to_langchain_tool_import_error(mock_client_from_access_key: MagicMock) -> None:
+    with patch("cleanlab_codex.codex_tool.Project") as mock_project:
+        mock_project.from_access_key.return_value = MagicMock(client=mock_client_from_access_key, id="test_project_id")
+
+        tool = CodexTool.from_access_key("sk-test-123")
+        patch_import_with_import_error("langchain")
+        with pytest.raises(MissingDependencyError) as exc_info:
+            tool.to_langchain_tool()
+
+        assert exc_info.value.import_name == "langchain"
+
+
 def test_to_aws_converse_tool(mock_client_from_access_key: MagicMock) -> None:
     with patch("cleanlab_codex.codex_tool.Project") as mock_project:
         mock_project.from_access_key.return_value = MagicMock(client=mock_client_from_access_key, id="test_project_id")
@@ -95,3 +134,21 @@ def test_to_smolagents_tool(mock_client_from_access_key: MagicMock) -> None:
         assert isinstance(smolagents_tool, Tool)
         assert smolagents_tool.name == tool.tool_name
         assert smolagents_tool.description == tool.tool_description
+
+
+def test_to_smolagents_tool_import_error(
+    mock_client_from_access_key: MagicMock,
+) -> None:
+    with patch("cleanlab_codex.codex_tool.Project") as mock_project:
+        mock_project.from_access_key.return_value = MagicMock(client=mock_client_from_access_key, id="test_project_id")
+
+        tool = CodexTool.from_access_key("sk-test-123")
+        import_module_name = "smolagents"
+        if sys.version_info >= (3, 10):
+            import_module_name = "cleanlab_codex.utils.smolagents"
+            patch_import_with_import_error(import_module_name)
+
+        with pytest.raises(MissingDependencyError) as exc_info:
+            tool.to_smolagents_tool()
+
+        assert exc_info.value.import_name == import_module_name