mirror of
https://github.com/hwchase17/langchain.git
synced 2025-12-02 06:46:07 +00:00
a0c2281540
```python
"""python scripts/update_mypy_ruff.py"""
import glob
import tomllib
from pathlib import Path
import toml
import subprocess
import re
ROOT_DIR = Path(__file__).parents[1]
def main():
for path in glob.glob(str(ROOT_DIR / "libs/**/pyproject.toml"), recursive=True):
print(path)
with open(path, "rb") as f:
pyproject = tomllib.load(f)
try:
pyproject["tool"]["poetry"]["group"]["typing"]["dependencies"]["mypy"] = (
"^1.10"
)
pyproject["tool"]["poetry"]["group"]["lint"]["dependencies"]["ruff"] = (
"^0.5"
)
except KeyError:
continue
with open(path, "w") as f:
toml.dump(pyproject, f)
cwd = "/".join(path.split("/")[:-1])
completed = subprocess.run(
"poetry lock --no-update; poetry install --with typing; poetry run mypy . --no-color",
cwd=cwd,
shell=True,
capture_output=True,
text=True,
)
logs = completed.stdout.split("\n")
to_ignore = {}
for l in logs:
if re.match("^(.*)\:(\d+)\: error:.*\[(.*)\]", l):
path, line_no, error_type = re.match(
"^(.*)\:(\d+)\: error:.*\[(.*)\]", l
).groups()
if (path, line_no) in to_ignore:
to_ignore[(path, line_no)].append(error_type)
else:
to_ignore[(path, line_no)] = [error_type]
print(len(to_ignore))
for (error_path, line_no), error_types in to_ignore.items():
all_errors = ", ".join(error_types)
full_path = f"{cwd}/{error_path}"
try:
with open(full_path, "r") as f:
file_lines = f.readlines()
except FileNotFoundError:
continue
file_lines[int(line_no) - 1] = (
file_lines[int(line_no) - 1][:-1] + f" # type: ignore[{all_errors}]\n"
)
with open(full_path, "w") as f:
f.write("".join(file_lines))
subprocess.run(
"poetry run ruff format .; poetry run ruff --select I --fix .",
cwd=cwd,
shell=True,
capture_output=True,
text=True,
)
if __name__ == "__main__":
main()
```
116 lines
3.8 KiB
Python
116 lines
3.8 KiB
Python
"""Select and order examples based on ngram overlap score (sentence_bleu score).
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https://www.nltk.org/_modules/nltk/translate/bleu_score.html
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https://aclanthology.org/P02-1040.pdf
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"""
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from typing import Dict, List
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import numpy as np
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from langchain_core.example_selectors import BaseExampleSelector
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from langchain_core.prompts import PromptTemplate
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from langchain_core.pydantic_v1 import BaseModel, root_validator
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def ngram_overlap_score(source: List[str], example: List[str]) -> float:
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"""Compute ngram overlap score of source and example as sentence_bleu score
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from NLTK package.
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Use sentence_bleu with method1 smoothing function and auto reweighting.
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Return float value between 0.0 and 1.0 inclusive.
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https://www.nltk.org/_modules/nltk/translate/bleu_score.html
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https://aclanthology.org/P02-1040.pdf
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"""
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from nltk.translate.bleu_score import (
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SmoothingFunction, # type: ignore
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sentence_bleu,
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)
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hypotheses = source[0].split()
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references = [s.split() for s in example]
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return float(
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sentence_bleu(
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references,
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hypotheses,
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smoothing_function=SmoothingFunction().method1,
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auto_reweigh=True,
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)
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)
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class NGramOverlapExampleSelector(BaseExampleSelector, BaseModel):
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"""Select and order examples based on ngram overlap score (sentence_bleu score
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from NLTK package).
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https://www.nltk.org/_modules/nltk/translate/bleu_score.html
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https://aclanthology.org/P02-1040.pdf
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"""
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examples: List[dict]
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"""A list of the examples that the prompt template expects."""
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example_prompt: PromptTemplate
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"""Prompt template used to format the examples."""
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threshold: float = -1.0
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"""Threshold at which algorithm stops. Set to -1.0 by default.
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For negative threshold:
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select_examples sorts examples by ngram_overlap_score, but excludes none.
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For threshold greater than 1.0:
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select_examples excludes all examples, and returns an empty list.
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For threshold equal to 0.0:
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select_examples sorts examples by ngram_overlap_score,
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and excludes examples with no ngram overlap with input.
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"""
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@root_validator(pre=True)
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def check_dependencies(cls, values: Dict) -> Dict:
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"""Check that valid dependencies exist."""
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try:
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from nltk.translate.bleu_score import ( # noqa: F401
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SmoothingFunction,
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sentence_bleu,
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)
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except ImportError as e:
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raise ImportError(
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"Not all the correct dependencies for this ExampleSelect exist."
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"Please install nltk with `pip install nltk`."
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) from e
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return values
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def add_example(self, example: Dict[str, str]) -> None:
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"""Add new example to list."""
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self.examples.append(example)
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def select_examples(self, input_variables: Dict[str, str]) -> List[dict]:
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"""Return list of examples sorted by ngram_overlap_score with input.
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Descending order.
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Excludes any examples with ngram_overlap_score less than or equal to threshold.
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"""
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inputs = list(input_variables.values())
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examples = []
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k = len(self.examples)
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score = [0.0] * k
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first_prompt_template_key = self.example_prompt.input_variables[0]
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for i in range(k):
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score[i] = ngram_overlap_score(
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inputs, [self.examples[i][first_prompt_template_key]]
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)
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while True:
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arg_max = np.argmax(score)
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if (score[arg_max] < self.threshold) or abs(
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score[arg_max] - self.threshold
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) < 1e-9:
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break
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examples.append(self.examples[arg_max])
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score[arg_max] = self.threshold - 1.0
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return examples
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