[英]AWS Lambda JSON to DynamoDB KeyError Serializing JSON
I am setting up my lambda function on AWS and want to insert my JSON into the DynamoDB (NoSQL). 我正在AWS上设置lambda函数,并想将JSON插入DynamoDB(NoSQL)。 I think it has to do with the serialization of the JSON (decimal_serializer), but I might be wrong.
我认为这与JSON(decimal_serializer)的序列化有关,但我可能错了。 Thanks for help!
感谢帮助!
I get following error while serializing this data: 序列化此数据时出现以下错误:
Error MSG: 错误MSG:
{
"errorMessage": "'male_confidence'",
"errorType": "KeyError"
}
JSON DATA to INSERT: JSON数据插入:
{
"device_id": "abc876",
"recorded_at": "1496136878",
"customers": [
{
"male_confidence": "0.2",
"female_confidence": "0.8"
},
{
"male_confidence:": "0.1",
"female_confidence": "0.9"
}
]
}
Lambda Function Handler Lambda函数处理程序
import boto3
import json
def lambda_handler(event, context):
# TODO implement
client = boto3.client('dynamodb')
for customer in event['customers']:
client.put_item(TableName="cv_data_1", Item={'device_id': {"S": event['device_id']}, 'male_confindence': {"N": customer['male_confidence']}, 'female_confidence': {"N": customer['female_confidence']}, "timestamp":{ "N": event['recorded_at']}})
print('Successfully processed %s items.' % str(len(event['customers'])))
AWS Output Log Error (Detail): AWS输出日志错误(详细信息):
During handling of the above exception, another exception occurred:
09:23:38
Traceback (most recent call last):
09:23:38
File "/var/runtime/awslambda/bootstrap.py", line 463, in <module>
09:23:38
main()
09:23:38
File "/var/runtime/awslambda/bootstrap.py", line 459, in main
09:23:38
handle_event_request(request_handler, invokeid, event_body, context_objs, invoked_function_arn)
09:23:38
File "/var/runtime/awslambda/bootstrap.py", line 240, in handle_event_request
09:23:38
result = to_json(result)
09:23:38
File "/var/runtime/awslambda/bootstrap.py", line 215, in to_json
09:23:38
return json.dumps(obj, default=decimal_serializer)
09:23:38
File "/var/lang/lib/python3.6/json/__init__.py", line 238, in dumps
09:23:38
**kw).encode(obj)
09:23:38
File "/var/lang/lib/python3.6/json/encoder.py", line 199, in encode
09:23:38
chunks = self.iterencode(o, _one_shot=True)
09:23:38
File "/var/lang/lib/python3.6/json/encoder.py", line 257, in iterencode
09:23:38
return _iterencode(o, 0)
09:23:38
File "/var/runtime/awslambda/bootstrap.py", line 104, in decimal_serializer
09:23:38
raise TypeError(repr(o) + " is not JSON serializable")
09:23:38
TypeError: <FrameSummary file /var/task/lambda_function.py, line 8 in lambda_handler> is not JSON serializable
Typo: 错别字:
"male_confidence:": "0.1",
"female_confidence": "0.9"
"male_confidence:" “ male_confidence:”
You have a typo after male_confidence:
, note the extra :
. male_confidence:
后有错别字,请注意额外的:
。 Try this 尝试这个
{
"device_id": "abc876",
"recorded_at": "1496136878",
"customers": [
{
"male_confidence": "0.2",
"female_confidence": "0.8"
},
{
"male_confidence": "0.1",
"female_confidence": "0.9"
}
]
}
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