[Solved] You wrote this AWS Lambda function in Python:def handler(event, context): return event['message']When triggered with event {}, it throws a KeyError. How can you fix it? | AWS

AWS - Lambda

You wrote this AWS Lambda function in Python:

def handler(event, context):
    return event['message']

When triggered with event {}, it throws a KeyError. How can you fix it?

AUse event.get('message', 'No message') instead of event['message']

BRemove the return statement

CAdd a print statement before return

DChange function name to lambda_handler

Step-by-Step Solution

Solution:

Step 1: Identify cause of KeyError
Accessing event['message'] when 'message' key is missing causes KeyError.
Step 2: Use safe access method
Replacing event['message'] with event.get('message', 'No message') avoids error by providing default.
Final Answer:
Use event.get('message', 'No message') instead of event['message'] -> Option A
Quick Check:
Use get() to avoid KeyError on missing keys [OK]

Quick Trick: Use get() with default to prevent KeyError [OK]

Common Mistakes:

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