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feat: Update print_streaming_chunk to work with dict version of ChoiceDeltaToolCall #9365

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feat: Update print_streaming_chunk to work with dict version of ChoiceDeltaToolCall #9365

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19 changes: 12 additions & 7 deletions haystack/components/generators/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,18 +25,23 @@ def print_streaming_chunk(chunk: StreamingChunk) -> None:
# Print tool call metadata if available (from ChatGenerator)
if chunk.meta.get("tool_calls"):
for tool_call in chunk.meta["tool_calls"]:
if isinstance(tool_call, ChoiceDeltaToolCall) and tool_call.function:
if isinstance(tool_call, ChoiceDeltaToolCall):
tool_call_dict = tool_call.to_dict()
else:
tool_call_dict = tool_call

if tool_call_dict.get("function"):
# print the tool name
if tool_call.function.name and not tool_call.function.arguments:
if tool_call_dict["function"].get("name") and not tool_call_dict["function"].get("arguments"):
print("[TOOL CALL]\n", flush=True, end="")
print(f"Tool: {tool_call.function.name} ", flush=True, end="")
print(f"Tool: {tool_call_dict['function']['name']} ", flush=True, end="")

# print the tool arguments
if tool_call.function.arguments:
if tool_call.function.arguments.startswith("{"):
if tool_call_dict["function"].get("arguments"):
if tool_call_dict["function"]["arguments"].startswith("{"):
print("\nArguments: ", flush=True, end="")
print(tool_call.function.arguments, flush=True, end="")
if tool_call.function.arguments.endswith("}"):
print(tool_call_dict["function"]["arguments"], flush=True, end="")
if tool_call_dict["function"]["arguments"].endswith("}"):
print("\n\n", flush=True, end="")

# Print tool call results if available (from ToolInvoker)
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