AWS Lambda的字典问题-Python

Question

I'm developing an AWS lambda function with Python 3.6 and facing an odd scenario.

Locally, calling the function with python-lambda-local everything works fine.

In AWS, the snippet below raises an exception:

def handler(event, context):
    data = event['body']
    logger.info("###DATAAAAA BODY " + str(data))
    origem = data.get('origem','')

Error:

AttributeError: 'str' object has no attribute 'get'

It seems that, locally, the object data is a dict . But in AWS it is a str .

Answer 1

Thanks to the @gddc comment I could find the answer.

The problem is that API Gateway wrap the body value of the event with quotes .

So I have to parse it first to dict .

The correct code:

def handler(event, context):
    logger.info("###EVENT " + str(event))
    data = event.get('body')
    data = json.loads(data)