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%")

    # Read the DL model
    model = ModelHandler()
    setattr(context.user_data, 'model', model)

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

def handler(context, event):
    context.logger.info("Run SiamMask model")
    data = event.body
    buf = io.BytesIO(base64.b64decode(data["image"].encode('utf-8')))
    shape = data.get("shape")
    state = data.get("state")
    image = Image.open(buf)

    results = context.user_data.model.infer(image, shape, state)

    return context.Response(body=json.dumps(results), headers={},
        content_type='application/json', status_code=200)