app.py

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from transformers import pipeline

app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Adjust this if you know the specific origin
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

classifier = pipeline("zero-shot-classification", model="valhalla/distilbart-mnli-12-1")


@app.get("/")
def greet_json():
    return "Hello"

@app.post('/zero-shot-classification')
def classify(source: str, labels: list[str]) -> dict[str, str]:
    c = classifier(source, candidate_labels = labels)
    return dict(zip(c['labels'], c['scores']))