fix(openai): add check for tool_call length

badbye · hassiebp · web-flow · commit fef0b4a9a5b5 · 2025-07-24T18:57:01.000+02:00
fix openai.py: when `tool_call` is a empty list, it raise an `list index out of range` error

Co-authored-by: Hassieb Pakzad &lt;68423100+hassiebp@users.noreply.github.com&gt;
diff --git a/langfuse/openai.py b/langfuse/openai.py
@@ -570,7 +570,7 @@ def _extract_streamed_openai_response(resource: Any, chunks: Any) -> Any:
                         )
                         curr["arguments"] += getattr(tool_call_chunk, "arguments", "")
 
-                elif delta.get("tool_calls", None) is not None:
+                elif delta.get("tool_calls", None) is not None and len(delta.get("tool_calls")) > 0:
                     curr = completion["tool_calls"]
                     tool_call_chunk = getattr(
                         delta.get("tool_calls", None)[0], "function", None

Original file line number	Diff line number	Diff line change
`@@ -570,7 +570,7 @@ def _extract_streamed_openai_response(resource: Any, chunks: Any) -> Any:`
`570`	`570`	`)`
`571`	`571`	`curr["arguments"] += getattr(tool_call_chunk, "arguments", "")`
`572`	`572`
`573`		`- elif delta.get("tool_calls", None) is not None:`
	`573`	`+ elif delta.get("tool_calls", None) is not None and len(delta.get("tool_calls")) > 0:`
`574`	`574`	`curr = completion["tool_calls"]`
`575`	`575`	`tool_call_chunk = getattr(`
`576`	`576`	`delta.get("tool_calls", None)[0], "function", None`