main.py

import json
import base64
from PIL import Image
import io
from model_handler import ModelHandler

def init_context(context):
    context.logger.info("Init context...  0%")

    model = ModelHandler()
    context.user_data.model = model

    context.logger.info("Init context...100%")

def handler(context, event):
    context.logger.info("call handler")
    data = event.body
    points = data["pos_points"]
    buf = io.BytesIO(base64.b64decode(data["image"]))
    image = Image.open(buf)

    mask, polygon = context.user_data.model.handle(image, points)
    return context.Response(body=json.dumps({
            'points': polygon,
            'mask': mask.tolist(),
        }),
        headers={},
        content_type='application/json',
        status_code=200
    )