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core: deprecate PipelinePromptTemplate (#28644)

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Erick Friis 2024-12-09 19:56:48 -08:00 committed by GitHub
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libs/core/langchain_core/prompts/pipeline.py
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@ -3,6 +3,7 @@ from typing import Optional as Optional
from pydantic import model_validator
from langchain_core._api.deprecation import deprecated
from langchain_core.prompt_values import PromptValue
from langchain_core.prompts.base import BasePromptTemplate
from langchain_core.prompts.chat import BaseChatPromptTemplate
@ -12,8 +13,28 @@ def _get_inputs(inputs: dict, input_variables: list[str]) -> dict:
return {k: inputs[k] for k in input_variables}
@deprecated(
since="0.3.22",
removal="1.0",
message=(
"This class is deprecated. Please see the docstring below or at the link"
" for a replacement option: "
"https://python.langchain.com/api_reference/core/prompts/langchain_core.prompts.pipeline.PipelinePromptTemplate.html"
),
)
class PipelinePromptTemplate(BasePromptTemplate):
"""Prompt template for composing multiple prompt templates together.
"""
This has been deprecated in favor of chaining individual prompts together in your
code. E.g. using a for loop, you could do:
.. code-block:: python
my_input = {"key": "value"}
for name, prompt in pipeline_prompts:
my_input[name] = prompt.invoke(my_input).to_string()
my_output = final_prompt.invoke(my_input)
Prompt template for composing multiple prompt templates together.
This can be useful when you want to reuse parts of prompts.