Invoking python lambda with arguments

Question

I have a simple lambda function which accepts an argument and prints it.

import json def lambda_handler(event, context): temp = event["temp"] return { 'statuscode': 200, 'body': json.dumps(f'Hello from {temp}!') }

I've enabled function url in lambda and set authorization as None. Without any arguments, curl https://xxxx.lambda-url.us-east-1.on.aws works.

Using Test through the console, I get the correct output, but not through a curl call.

curl -X POST https://xxxx.lambda-url.us-east-1.on.aws \ -H 'content-type: application/json' \ --data '{"temp":"Hello World"}' \ > Internal Server Error%

It's worth getting familiar with debugging Lambda functions via CloudWatch Logs. — jarmod
– jarmod, Commented Nov 5, 2022 at 22:54

Youcef LAIDANI · Accepted Answer · 2022-11-05 20:09:44Z

You forgot a step in your code. You have to extract the body first from the event, and then you can extract the temp attribute from the body, for example like this:

def lambda_handler(event, context): body = json.loads(event['body']) temp = body['temp'] return { 'statuscode': 200, 'body': json.dumps(f'Hello from {temp}!') }

Thanks a lot, that worked like a charm. I got confused with how I used to do with google cloud functions. Should start looking at cloudwatch logs, dumb of me.

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