Migrate to langchain_anthropic and add ChatAnthropic enhancements (#1551

)

Migrate to langchain_anthropic and enhance ChatAnthropic functionality

- Replace langchain_community with langchain_anthropic for ChatAnthropic
- Add support for selecting the Claude model in ChatAnthropic
- Implement top_p and top_k parameter support in ChatAnthropic

pyproject.toml

@@ -60,7 +60,6 @@ cohere = "^4.47.0"
 python-multipart = "^0.0.7"
 sqlmodel = "^0.0.14"
 faiss-cpu = "^1.7.4"
-anthropic = "^0.15.0"
 orjson = "3.9.15"
 multiprocess = "^0.70.14"
 cachetools = "^5.3.1"
@@ -105,6 +104,8 @@ elasticsearch = "^8.12.0"
 pytube = "^15.0.0"
 llama-index = "0.9.48"
 langchain-openai = "^0.0.6"
+urllib3 = "<2"
+langchain-anthropic = "^0.1.4"
 
 [tool.poetry.group.dev.dependencies]
 pytest-asyncio = "^0.23.1"

src/backend/langflow/components/llms/ChatAnthropic.py

@@ -2,7 +2,9 @@
 from langflow import CustomComponent
 from typing import Optional, Union, Callable
 from langflow.field_typing import BaseLanguageModel
-from langchain_community.chat_models.anthropic import ChatAnthropic
+
+# from langchain_community.chat_models.anthropic import ChatAnthropic
+from langchain_anthropic import ChatAnthropic
 
 
 class ChatAnthropicComponent(CustomComponent):
@@ -17,31 +19,48 @@ def build_config(self):
  "field_type": "str",
  "password": True,
  },
- "anthropic_api_url": {
- "display_name": "Anthropic API URL",
- "field_type": "str",
- },
  "model_kwargs": {
  "display_name": "Model Kwargs",
  "field_type": "dict",
  "advanced": True,
  },
+ "model_name": {
+ "display_name": "Model Name",
+ "field_type": "str",
+ "advanced": False,
+ "required": False,
+ "options": ["claude-3-opus-20240229", "claude-3-sonnet-20240229", "claude-3-haiku-20240307"],
+ },
  "temperature": {
  "display_name": "Temperature",
  "field_type": "float",
  },
+ "max_tokens": {
+ "display_name": "Max Tokens",
+ "field_type": "int",
+ "advanced": False,
+ "required": False,
+ },
+ "top_k": {"display_name": "Top K", "field_type": "int", "advanced": True},
+ "top_p": {"display_name": "Top P", "field_type": "float", "advanced": True},
  }
 
  def build(
  self,
  anthropic_api_key: str,
- anthropic_api_url: Optional[str] = None,
  model_kwargs: dict = {},
+ model_name: str = "claude-3-opus-20240229",
  temperature: Optional[float] = None,
+ max_tokens: Optional[int] = 1024,
+ top_k: Optional[int] = None,
+ top_p: Optional[float] = None,
  ) -> Union[BaseLanguageModel, Callable]:
  return ChatAnthropic(
  anthropic_api_key=SecretStr(anthropic_api_key),
- anthropic_api_url=anthropic_api_url,
  model_kwargs=model_kwargs,
+ model_name=model_name,
  temperature=temperature,
+ max_tokens=max_tokens,
+ top_k=top_k,
+ top_p=top_p,
  )