add anthropic page (#10666)

libs/langchain/langchain/chat_models/anthropic.py

@@ -15,6 +15,7 @@ from langchain.schema.messages import (
     SystemMessage,
 )
 from langchain.schema.output import ChatGeneration, ChatGenerationChunk, ChatResult
+from langchain.schema.prompt import PromptValue
 
 
 def _convert_one_message_to_text(
@@ -112,6 +113,9 @@ class ChatAnthropic(BaseChatModel, _AnthropicCommon):
             prompt_params["ai_prompt"] = self.AI_PROMPT
         return convert_messages_to_prompt_anthropic(messages=messages, **prompt_params)
 
+    def convert_prompt(self, prompt: PromptValue) -> str:
+        return self._convert_messages_to_prompt(prompt.to_messages())
+
     def _stream(
         self,
         messages: List[BaseMessage],

libs/langchain/langchain/llms/anthropic.py

@@ -10,6 +10,7 @@ from langchain.llms.base import LLM
 from langchain.pydantic_v1 import Field, root_validator
 from langchain.schema.language_model import BaseLanguageModel
 from langchain.schema.output import GenerationChunk
+from langchain.schema.prompt import PromptValue
 from langchain.utils import (
     check_package_version,
     get_from_dict_or_env,
@@ -234,6 +235,9 @@ class Anthropic(LLM, _AnthropicCommon):
         )
         return response.completion
 
+    def convert_prompt(self, prompt: PromptValue) -> str:
+        return self._wrap_prompt(prompt.to_string())
+
     async def _acall(
         self,
         prompt: str,