Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Request Inferences from a Deployed Service (Amazon SageMaker SDK)

Use the following the code examples to request inferences from your deployed service based on the framework you used to train your model. The code examples for the different frameworks are similar. The main difference is that TensorFlow requires application/json as the content type.

PyTorch and MXNet

If you are using PyTorch v1.4 or later or MXNet 1.7.0 or later and you have an Amazon SageMaker endpoint InService, you can make inference requests using the predictor package of the SageMaker SDK for Python.

The following code example shows how to use these APIs to send an image for inference:

SageMaker Python SDK v1.x

from sagemaker.predictor import RealTimePredictor

endpoint = 'insert name of your endpoint here'

# Read image into memory
payload = None
with open("image.jpg", 'rb') as f:
    payload = f.read()

predictor = RealTimePredictor(endpoint=endpoint, content_type='application/x-image')
inference_response = predictor.predict(data=payload)
print (inference_response)

SageMaker Python SDK v2.x

from sagemaker.predictor import Predictor

endpoint = 'insert name of your endpoint here'

# Read image into memory
payload = None
with open("image.jpg", 'rb') as f:
    payload = f.read()
    
predictor = Predictor(endpoint)
inference_response = predictor.predict(data=payload)
print (inference_response)

TensorFlow

The following code example shows how to use the SageMaker Python SDK API to send an image for inference:

from sagemaker.predictor import Predictor
from PIL import Image
import numpy as np
import json

endpoint = 'insert the name of your endpoint here'

# Read image into memory
image = Image.open(input_file)
batch_size = 1
image = np.asarray(image.resize((224, 224)))
image = image / 128 - 1
image = np.concatenate([image[np.newaxis, :, :]] * batch_size)
body = json.dumps({"instances": image.tolist()})
    
predictor = Predictor(endpoint)
inference_response = predictor.predict(data=body)
print(inference_response)