fix: stream bugs and update siliconflow_model_example.py (#2358)

Co-authored-by: Wendong <w3ndong.fan@gmail.com>
Co-authored-by: Wendong-Fan <133094783+Wendong-Fan@users.noreply.github.com>

Author: fengju0213

camel/agents/chat_agent.py

@@ -1311,7 +1311,9 @@ def _handle_stream_response(
         response_id: str = ""
         # All choices in one response share one role
         for chunk in response:
-            response_id = chunk.id
+            # Some model platforms like siliconflow may return None for the
+            # chunk.id
+            response_id = chunk.id if chunk.id else str(uuid.uuid4())
             self._handle_chunk(
                 chunk, content_dict, finish_reasons_dict, output_messages
             )
@@ -1351,7 +1353,9 @@ async def _ahandle_stream_response(
         response_id: str = ""
         # All choices in one response share one role
         async for chunk in response:
-            response_id = chunk.id
+            # Some model platforms like siliconflow may return None for the
+            # chunk.id
+            response_id = chunk.id if chunk.id else str(uuid.uuid4())
             self._handle_chunk(
                 chunk, content_dict, finish_reasons_dict, output_messages
             )

camel/types/enums.py

@@ -15,8 +15,11 @@
 from enum import Enum, EnumMeta
 from typing import cast
 
+from camel.logger import get_logger
 from camel.types.unified_model_type import UnifiedModelType
 
+logger = get_logger(__name__)
+
 
 class RoleType(Enum):
     ASSISTANT = "assistant"
@@ -1200,7 +1203,11 @@ def token_limit(self) -> int:
         }:
             return 10_000_000
         else:
-            raise ValueError("Unknown model type")
+            logger.warning(
+                f"Unknown model type {self}, set maximum token limit "
+                f"to 999_999_999"
+            )
+            return 999_999_999
 
 
 class EmbeddingModelType(Enum):

examples/models/siliconflow_model_example.py

@@ -19,7 +19,9 @@
 model = ModelFactory.create(
     model_platform=ModelPlatformType.SILICONFLOW,
     model_type="deepseek-ai/DeepSeek-R1",
-    model_config_dict=SiliconFlowConfig(temperature=0.2).as_dict(),
+    model_config_dict=SiliconFlowConfig(
+        temperature=0.2, stream=True
+    ).as_dict(),
 )
 
 # Define system message