zero-shot-classification-zh/classification.py

from pprint import pprint

from pydantic import BaseModel
from transformers import pipeline
from config import MODEL_ARGS

classifier = pipeline("zero-shot-classification", **MODEL_ARGS)


class ClassifyResult(BaseModel):
    sequence: str
    prediction: str
    prediction_score: float
    ranks: list[str]
    labels: list[str]
    scores: list[float]



def classify(text: str, labels: list):
    output = classifier(text, labels)

    # 根据 score，寻找最高的 label
    prediction_rank = output['scores'].index(max(output['scores']))

    return ClassifyResult(
        sequence=text,
        prediction=output['labels'][prediction_rank],
        prediction_score=output['scores'][prediction_rank],
        ranks=output['labels'],
        labels=labels,
        scores=output['scores'],
    )