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core[patch]: dont deep copy merge_message_runs (#28454)

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afaict no need to deep copy here, if we merge messages then we convert
them to chunks first anyways
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Bagatur 2025-02-22 13:56:45 -08:00 committed by GitHub
parent afa94e5bf7
commit 979a991dc2
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1 changed files with 4 additions and 5 deletions
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9
libs/core/langchain_core/messages/utils.py
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@ -557,15 +557,14 @@ def merge_message_runs(
messages = convert_to_messages(messages)
merged: list[BaseMessage] = []
for msg in messages:
curr = msg.model_copy(deep=True)
last = merged.pop() if merged else None
if not last:
merged.append(curr)
elif isinstance(curr, ToolMessage) or not isinstance(curr, last.__class__):
merged.extend([last, curr])
merged.append(msg)
elif isinstance(msg, ToolMessage) or not isinstance(msg, last.__class__):
merged.extend([last, msg])
else:
last_chunk = _msg_to_chunk(last)
curr_chunk = _msg_to_chunk(curr)
curr_chunk = _msg_to_chunk(msg)
if curr_chunk.response_metadata:
curr_chunk.response_metadata.clear()
if (