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anthropic[patch]: Fix message type lookup in Anthropic Partners (#16563)

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- **Description:** 

The parameters for user and assistant in Anthropic should be 'ai ->
assistant,' but they are reversed to 'assistant -> ai.'
Below is error code.
```python
anthropic.BadRequestError: Error code: 400 - {'type': 'error', 'error': {'type': 'invalid_request_error', 'message': 'messages: Unexpected role "ai". Allowed roles are "user" or "assistant"'}}
```

[anthropic](7177f3a71f/src/anthropic/types/beta/message_param.py (L13))

  - **Issue:** : #16561
  -  **Dependencies:** : None
   - **Twitter handle:** : None
This commit is contained in:
JongRok BAEK 2024-01-26 02:17:59 +09:00 committed by GitHub
parent e86e66bad7
commit 3b8eba32f9
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libs/partners/anthropic/langchain_anthropic/chat_models.py
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@ -16,7 +16,7 @@ from langchain_core.outputs import ChatGeneration, ChatGenerationChunk, ChatResu
from langchain_core.pydantic_v1 import Field, SecretStr, root_validator
from langchain_core.utils import convert_to_secret_str
_message_type_lookups = {"human": "user", "assistant": "ai"}
_message_type_lookups = {"human": "user", "ai": "assistant"}
def _format_messages(messages: List[BaseMessage]) -> Tuple[Optional[str], List[Dict]]: