feat: Enhance MCP sentiment analysis with dynamic smolagents import

- Added a try-except block to conditionally import `MCPClient` from `smolagents`, improving error handling for its availability.
- Updated the `test_mcp_sentiment_analysis` function to check for `smolagents` availability before proceeding with sentiment analysis.
- Simplified the `check_smolagents` function to utilize the new availability check, enhancing code clarity and maintainability.

usage/sentiment_mcp.py

@@ -20,6 +20,14 @@ https://huggingface.co/learn/mcp-course/unit2/gradio-client
 
 import time
 
+try:
+    from smolagents.mcp_client import MCPClient
+
+    SMOLAGENTS_AVAILABLE = True
+except ImportError:
+    MCPClient = None
+    SMOLAGENTS_AVAILABLE = False
+
 
 def test_mcp_sentiment_analysis():
     """Test MCP connection using smolagents MCPClient."""
@@ -29,16 +37,13 @@ def test_mcp_sentiment_analysis():
     print("Based on: https://huggingface.co/learn/mcp-course/unit2/gradio-client")
     print()
 
-    try:
-        # Import here to handle import errors gracefully
-        from smolagents.mcp_client import MCPClient
-
-        print("✅ smolagents imported successfully")
-    except ImportError as e:
-        print(f"❌ Failed to import smolagents: {e}")
+    if not SMOLAGENTS_AVAILABLE:
+        print("❌ smolagents not available")
         print("Install with: pdm add 'smolagents[mcp]'")
         return False
 
+    print("✅ smolagents imported successfully")
+
     # Test texts
     test_texts = [
         "I love this product! It's amazing!",
@@ -97,7 +102,7 @@ def test_mcp_sentiment_analysis():
                         print(f"  ✅ Result: {result}")
                         print(f"  ⏱️  Time: {elapsed:.2f}s")
 
-            except Exception as e:
+            except Exception as e:  # pylint: disable=broad-except
                 elapsed = time.time() - start_time
                 print(f"  ❌ Error after {elapsed:.2f}s: {e}")
 
@@ -106,7 +111,7 @@ def test_mcp_sentiment_analysis():
         print("🎉 MCP sentiment analysis completed!")
         return True
 
-    except Exception as e:
+    except Exception as e:  # pylint: disable=broad-except
         print(f"❌ Failed to connect with smolagents: {e}")
         print(f"Error type: {type(e).__name__}")
         print("\nTroubleshooting:")
@@ -120,21 +125,18 @@ def test_mcp_sentiment_analysis():
             try:
                 mcp_client.disconnect()
                 print("✅ MCP client disconnected properly")
-            except Exception as e:
+            except Exception as e:  # pylint: disable=broad-except
                 print(f"⚠️  Disconnect warning: {e}")
 
 
 def check_smolagents():
     """Check if smolagents is available."""
-    try:
-        import smolagents.mcp_client
-
+    if SMOLAGENTS_AVAILABLE:
         print("✅ smolagents is available")
         return True
-    except ImportError:
-        print("❌ smolagents not found")
-        print("Install with: pdm add 'smolagents[mcp]'")
-        return False
+    print("❌ smolagents not found")
+    print("Install with: pdm add 'smolagents[mcp]'")
+    return False
 
 
 if __name__ == "__main__":