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我正在嘗試使用下面的代碼，但我無法使其工作。它不斷給我一個關於過濾器表達式是錯誤類型的錯誤消息，即使我正在執行the documentation中的完成操作。我能做些什麼來解決這個問題？Boto Scan Filterexpression：參數的類型無效
def EndpointDeleted(event):
endpoint = event['Attributes']['EndpointArn']
if('EndpointArn' in event['Attributes']):
client = boto3.client('dynamodb')
response = client.scan(
TableName='sniffergps-mobilehub-812282467-Users',
Select='ALL_ATTRIBUTES',
FilterExpression=Attr('Endpoints').contains(endpoint)
)
return response，但我得到一個錯誤，指出該過濾器表達式的類型不正確。我有以下的進口消息： import boto3 from boto3.dynamodb.conditions import Key from boto3.dynamodb.conditions import Attr
錯誤消息：
{
"errorMessage": "Parameter validation failed:\nInvalid type for parameter FilterExpression, value: <boto3.dynamodb.conditions.Contains object at 0x7fdca25e0b38>, type: <class 'boto3.dynamodb.conditions.Contains'>, valid types: <class 'str'>",
"errorType": "ParamValidationError",
"stackTrace": [
[
"/var/task/lambda_function.py",
13,
"lambda_handler",
"return EndpointDeleted(event)"
],
[
"/var/task/lambda_function.py",
24,
"EndpointDeleted",
"FilterExpression=Attr('Endpoints').contains(endpoint)"
],
[
"/var/runtime/botocore/client.py",
312,
"_api_call",
"return self._make_api_call(operation_name, kwargs)"
],
[
"/var/runtime/botocore/client.py",
575,
"_make_api_call",
"api_params, operation_model, context=request_context)"
],
[
"/var/runtime/botocore/client.py",
630,
"_convert_to_request_dict",
"api_params, operation_model)"
],
[
"/var/runtime/botocore/validate.py",
291,
"serialize_to_request",
"raise ParamValidationError(report=report.generate_report())"
]
]
}