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fix(streaming): handle dict objects that lack to_dict() in stream accumulator #1272

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fix(streaming): handle dict objects that lack to_dict() in stream accumulator #1272

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8 changes: 6 additions & 2 deletions src/anthropic/lib/streaming/_beta_messages.py
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Original file line number Diff line number Diff line change
Expand Up @@ -467,8 +467,9 @@ def accumulate_event(

if current_snapshot is None:
if event.type == "message_start":
message_data = event.message.to_dict() if hasattr(event.message, "to_dict") else dict(event.message)
return cast(
ParsedBetaMessage[ResponseFormatT], ParsedBetaMessage.construct(**cast(Any, event.message.to_dict()))
ParsedBetaMessage[ResponseFormatT], ParsedBetaMessage.construct(**cast(Any, message_data))
)

raise RuntimeError(f'Unexpected event order, got {event.type} before "message_start"')
Expand All @@ -478,7 +479,10 @@ def accumulate_event(
current_snapshot.content.append(
cast(
Any, # Pydantic does not support generic unions at runtime
construct_type(type_=ParsedBetaContentBlock, value=event.content_block.to_dict()),
construct_type(
type_=ParsedBetaContentBlock,
value=event.content_block.to_dict() if hasattr(event.content_block, "to_dict") else dict(event.content_block),
),
),
)
elif event.type == "content_block_delta":
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3 changes: 2 additions & 1 deletion src/anthropic/lib/streaming/_messages.py
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Original file line number Diff line number Diff line change
Expand Up @@ -449,7 +449,8 @@ def accumulate_event(

if current_snapshot is None:
if event.type == "message_start":
return cast(ParsedMessage[ResponseFormatT], ParsedMessage.construct(**cast(Any, event.message.to_dict())))
message_data = event.message.to_dict() if hasattr(event.message, "to_dict") else dict(event.message)
return cast(ParsedMessage[ResponseFormatT], ParsedMessage.construct(**cast(Any, message_data)))

raise RuntimeError(f'Unexpected event order, got {event.type} before "message_start"')

Expand Down