SESEvent KeyError

[rprentyaws]

What were you trying to accomplish?

Expected Behavior

I am trying to process an SES event using Lambda powertools for python.

Current Behavior

Error using this snippet:

[ERROR] KeyError: 0
Traceback (most recent call last):
  File "/var/task/lambda_function.py", line 11, in lambda_handler
    common_headers = list(mail.common_headers)
  File "/opt/python/aws_lambda_powertools/utilities/data_classes/common.py", line 11, in __getitem__
    return self._data[key]

Possible Solution

Steps to Reproduce (for bugs)

1. Use the code in this snippet with powertools
2. Use a test event of SES email, or just process an inbound SES email as the trigger.
3. Check CloudWatch logs.

Environment

• Powertools version used: 1.7.0
• Packaging format (Layers, PyPi): Layers
• AWS Lambda function runtime: Python 3.4
• Debugging logs

How to enable debug mode**

[ERROR] KeyError: 0
Traceback (most recent call last):
  File "/var/task/lambda_function.py", line 11, in lambda_handler
    common_headers = list(mail.common_headers)
  File "/opt/python/aws_lambda_powertools/utilities/data_classes/common.py", line 11, in __getitem__
    return self._data[key]

[to-mc]

This is a documentation error: common_headers is not an iterable, so the list() call fails. I'll submit a PR to fix this, but in the mean time this is the corrected example:

from aws_lambda_powertools.utilities.data_classes import SESEvent

def lambda_handler(event, context):
    event: SESEvent = SESEvent(event)

    # Multiple records can be delivered in a single event
    for record in event.records:
        mail = record.ses.mail
        common_headers = mail.common_headers

        do_something_with(common_headers.to, common_headers.subject)

[heitorlessa]

Now available in the docs - closing it :)