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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.""" """Prompt schema definition."""
from __future__ import annotations from __future__ import annotations
import warnings
from pathlib import Path from pathlib import Path
from typing import Any, Dict, List, Literal, Optional, Union from typing import Any, Dict, List, Literal, Optional, Union
@ -176,21 +177,30 @@ class PromptTemplate(StringPromptTemplate):
@classmethod @classmethod
def from_file( 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: ) -> PromptTemplate:
"""Load a prompt from a file. """Load a prompt from a file.
Args: Args:
template_file: The path to the file containing the prompt template. template_file: The path to the file containing the prompt template.
input_variables: A list of variable names the final prompt template input_variables: [DEPRECATED] A list of variable names the final prompt
will expect. template will expect.
input_variables is ignored as from_file now delegates to from_template().
Returns: Returns:
The prompt loaded from the file. The prompt loaded from the file.
""" """
with open(str(template_file), "r") as f: with open(str(template_file), "r") as f:
template = f.read() 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 @classmethod
def from_template( def from_template(