docs: handle ValidationError in chat streaming example

examples/chat/README.md

@@ -44,9 +44,12 @@ print(response.choices[0].message.content.root)
 ### Streaming Chat Completion
 
 ```python
+import json
+
+from pydantic import ValidationError
+
 from inference_gateway import InferenceGatewayClient, Message
 from inference_gateway.models import CreateChatCompletionStreamResponse
-import json
 
 client = InferenceGatewayClient("http://localhost:8080/v1")
 
@@ -65,17 +68,18 @@ for chunk in stream:
             # Parse the raw JSON data
             data = json.loads(chunk.data)
 
-            # Unmarshal to the structured model for type safety. The first
-            # chunk carries only `role` (no content) and validates fine.
+            # Unmarshal to the structured model for type safety. The model is
+            # strict: a delta without `content`, or a choice with a null
+            # `finish_reason`, raises `ValidationError` - skip those chunks.
             structured_chunk = CreateChatCompletionStreamResponse.model_validate(data)
 
             if structured_chunk.choices and len(structured_chunk.choices) > 0:
                 choice = structured_chunk.choices[0]
                 if choice.delta.content:
                     print(choice.delta.content, end="", flush=True)
 
-        except json.JSONDecodeError:
-            pass
+        except (json.JSONDecodeError, ValidationError):
+            continue
 ```
 
 ## Error Handling

examples/chat/main.py

@@ -1,6 +1,8 @@
 import json
 import os
 
+from pydantic import ValidationError
+
 from inference_gateway import InferenceGatewayClient, Message
 from inference_gateway.client import InferenceGatewayAPIError, InferenceGatewayError
 from inference_gateway.models import CreateChatCompletionStreamResponse, SSEvent
@@ -77,6 +79,9 @@ def main() -> None:
                     # Handle non-JSON SSE data
                     print(f"[Non-JSON chunk: {chunk.data}]", end="", flush=True)
 
+                except ValidationError:
+                    continue
+
         print("\n")
 
     except (InferenceGatewayAPIError, InferenceGatewayError) as e: