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import os
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from transformers import pipeline
import langdetect
# Set custom cache directory to avoid permission issues
os.environ["TRANSFORMERS_CACHE"] = "/app/cache"
app = FastAPI()
# Load sentiment analysis models
multilingual_model = pipeline("sentiment-analysis", model="tabularisai/multilingual-sentiment-analysis")
english_model = pipeline("sentiment-analysis", model="siebert/sentiment-roberta-large-english")
class SentimentRequest(BaseModel):
text: str
class SentimentResponse(BaseModel):
original_text: str
language_detected: str
sentiment: str
confidence_score: float
def detect_language(text: str) -> str:
try:
return langdetect.detect(text)
except:
return "unknown"
@app.get("/")
def home():
return {"message": "Sentiment Analysis API is running!"}
@app.post("/analyze/", response_model=SentimentResponse)
def analyze_sentiment(request: SentimentRequest):
if not request.text:
raise HTTPException(status_code=400, detail="No text provided")
text = request.text
language = detect_language(text)
# Choose the appropriate model based on language
if language == "en":
result = english_model(text)
else:
result = multilingual_model(text)
sentiment = result[0]["label"].lower()
score = result[0]["score"]
return SentimentResponse(
original_text=text,
language_detected=language,
sentiment=sentiment,
confidence_score=score
)
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