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Harrison/delegate from template (#14266)

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Co-authored-by: M.R. Sopacua <144725145+msopacua@users.noreply.github.com>
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Harrison Chase 2023-12-04 20:18:15 -08:00 committed by GitHub
parent 956d55de2b
commit 8eab4d95c0
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1 changed files with 14 additions and 4 deletions
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18
libs/core/langchain_core/prompts/prompt.py
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@ -1,6 +1,7 @@
"""Prompt schema definition."""
from __future__ import annotations
import warnings
from pathlib import Path
from typing import Any, Dict, List, Literal, Optional, Union
@ -176,21 +177,30 @@ class PromptTemplate(StringPromptTemplate):
@classmethod
def from_file(
cls, template_file: Union[str, Path], input_variables: List[str], **kwargs: Any
cls,
template_file: Union[str, Path],
input_variables: Optional[List[str]] = None,
**kwargs: Any,
) -> PromptTemplate:
"""Load a prompt from a file.
Args:
template_file: The path to the file containing the prompt template.
input_variables: A list of variable names the final prompt template
will expect.
input_variables: [DEPRECATED] A list of variable names the final prompt
template will expect.
input_variables is ignored as from_file now delegates to from_template().
Returns:
The prompt loaded from the file.
"""
with open(str(template_file), "r") as f:
template = f.read()
return cls(input_variables=input_variables, template=template, **kwargs)
if input_variables:
warnings.warn(
"`input_variables' is deprecated and ignored.", DeprecationWarning
)
return cls.from_template(template=template, **kwargs)
@classmethod
def from_template(