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# 通过已部署服务 (Boto3) 请求推理
<a name="neo-requests-boto3"></a>

 有了 SageMaker 人工智能终端节点后，你可以使用适用于 Python 的 AI SDK (Boto3) 客户端[https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/sagemaker-runtime.html#SageMakerRuntime.Client.invoke_endpoint](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/sagemaker-runtime.html#SageMakerRuntime.Client.invoke_endpoint)和 API 提交推理请求。 SageMaker `InService`以下代码示例演示如何发送映像以进行推理：

------
#### [ PyTorch and MXNet ]

```
import boto3

import json
 
endpoint = 'insert name of your endpoint here'
 
runtime = boto3.Session().client('sagemaker-runtime')
 
# Read image into memory
with open(image, 'rb') as f:
    payload = f.read()
# Send image via InvokeEndpoint API
response = runtime.invoke_endpoint(EndpointName=endpoint, ContentType='application/x-image', Body=payload)

# Unpack response
result = json.loads(response['Body'].read().decode())
```

------
#### [ TensorFlow ]

用于 TensorFlow 提交内容类型的输入。`application/json`

```
from PIL import Image
import numpy as np
import json
import boto3

client = boto3.client('sagemaker-runtime') 
input_file = 'path/to/image'
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()})
ioc_predictor_endpoint_name = 'insert name of your endpoint here'
content_type = 'application/json'   
ioc_response = client.invoke_endpoint(
    EndpointName=ioc_predictor_endpoint_name,
    Body=body,
    ContentType=content_type
 )
```

------
#### [ XGBoost ]

 对于 XGBoost 申请，您应该改为提交 CSV 文本：

```
import boto3
import json
 
endpoint = 'insert your endpoint name here'
 
runtime = boto3.Session().client('sagemaker-runtime')
 
csv_text = '1,-1.0,1.0,1.5,2.6'
# Send CSV text via InvokeEndpoint API
response = runtime.invoke_endpoint(EndpointName=endpoint, ContentType='text/csv', Body=csv_text)
# Unpack response
result = json.loads(response['Body'].read().decode())
```

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 请注意，BYOM 允许自定义内容类型。有关更多信息，请参阅 [https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_runtime_InvokeEndpoint.html](https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_runtime_InvokeEndpoint.html)。