Update app.py

app.py

@@ -1,7 +1,29 @@
 from fastapi import FastAPI
+from pydantic import BaseModel
+from transformers import pipeline
+import os
+import asyncio
+from contextlib import asynccontextmanager
 
-app = FastAPI()
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    global classifier
+    classifier = pipeline("sentiment-analysis")
+    yield
 
-@app.get("/")
-def greet_json():
-    return {"Hello": "World!"}
+app = FastAPI(lifespan=lifespan)
+
+class TextRequest(BaseModel):
+    text: str
+
+@app.post("/analyze")
+async def analyze(request: TextRequest):
+    try:
+        result = classifier(request.text)[0]
+        return {
+            "text": request.text,
+            "sentiment": result['label'],
+            "confidence": round(result['score'], 4)
+        }
+    except Exception as e:
+        return {"error": str(e)}