import logging
logger = logging.getLogger()
logger.setLevel("DEBUG")
def handler(event, context):
 logger.debug("hello")
 return`

from aws_lambda_powertools import Logger
logger = Logger()
def handler(event, context):
 logger.debug("hello")
 return

07 Dec 2025 07:45:50,538 [INFO] (rapid) exec '/var/runtime/bootstrap' (cwd=/var/task, handler=)
START RequestId: 632c768b-e4ef-4ba5-935e-d96e4721eebd Version: $LATEST
07 Dec 2025 07:45:51,978 [INFO] (rapid) INIT START(type: on-demand, phase: init)
07 Dec 2025 07:45:51,979 [INFO] (rapid) Starting runtime without AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN , Expected?: false
[WARNING] 2025年12月07日T07:45:52.021Z LAMBDA_WARNING: Unhandled exception. The most likely cause is an issue in the function code. However, in rare cases, a Lambda runtime update can cause unexpected function behavior. For functions using managed runtimes, runtime updates can be triggered by a function change, or can be applied automatically. To determine if the runtime has been updated, check the runtime version in the INIT_START log entry. If this error correlates with a change in the runtime version, you may be able to mitigate this error by temporarily rolling back to the previous runtime version. For more information, see https://docs.aws.amazon.com/lambda/latest/dg/runtimes-update.html
  warnings.warn("POWERTOOLS_DEBUG environment variable is enabled. Setting logging level to DEBUG.", stacklevel=2)
Exception ignored in: <socket.socket fd=3, family=2, type=1, proto=6, laddr=('127.0.0.1', 55310), raddr=('127.0.0.1', 9001)>
Traceback (most recent call last):
 File "/var/lang/lib/python3.13/site-packages/awslambdaric/lambda_runtime_client.py", line 108, in post_init_error
 self.call_rapid(
ResourceWarning: unclosed <socket.socket fd=3, family=2, type=1, proto=6, laddr=('127.0.0.1', 55310), raddr=('127.0.0.1', 9001)>
07 Dec 2025 07:45:52,039 [WARNING] (rapid) First fatal error stored in appctx: Runtime.ExitError
07 Dec 2025 07:45:52,039 [WARNING] (rapid) Process runtime-1 exited: exit status 1
07 Dec 2025 07:45:52,039 [INFO] (rapid) INIT RTDONE(status: error)
07 Dec 2025 07:45:52,039 [INFO] (rapid) INIT REPORT(durationMs: 60.936000)
07 Dec 2025 07:45:52,039 [ERROR] (rapid) Init failed error=Runtime exited with error: exit status 1 InvokeID=
07 Dec 2025 07:45:52,039 [WARNING] (rapid) Shutdown initiated: spindown
07 Dec 2025 07:45:52,039 [INFO] (rapid) Waiting for runtime domain processes termination
07 Dec 2025 07:45:52,040 [INFO] (rapid) INIT START(type: on-demand, phase: invoke)
07 Dec 2025 07:45:52,040 [INFO] (rapid) INIT REPORT(durationMs: 0.063000)
07 Dec 2025 07:45:52,040 [INFO] (rapid) INVOKE START(requestId: 3301816c-a1b5-43b8-8cf3-7a9c7bad0344)
07 Dec 2025 07:45:52,040 [ERROR] (rapid) Invoke failed error=Runtime exited with error: exit status 1 InvokeID=3301816c-a1b5-43b8-8cf3-7a9c7bad0344
07 Dec 2025 07:45:52,040 [ERROR] (rapid) Invoke DONE failed: Sandbox.Failure
07 Dec 2025 07:45:52,040 [WARNING] (rapid) Reset initiated: ReleaseFail
07 Dec 2025 07:45:52,040 [INFO] (rapid) Waiting for runtime domain processes termination

docker build -t test -F Dockerfile .
docker run --rm -p 9000:8080 \
		-e POWERTOOLS_DEBUG=true \
		-e POWERTOOLS_LOG_LEVEL=DEBUG \
		-v $(PWD)/app.py:/var/task/app.py \
		test

# syntax=docker/dockerfile:1
ARG PYTHON_VERSION=3.13
FROM public.ecr.aws/lambda/python:${PYTHON_VERSION} AS lambda
ENV PYTHONUNBUFFERED=1 \
 PYTHONWARNINGS=error \
 POWERTOOLS_DEBUG=true
RUN <<EOF
 mkdir -p /opt/{extensions,python}
 pip install --no-cache-dir --target /opt/python aws-lambda-powertools
EOF
COPY --link --chmod=0644 app.py ${LAMBDA_TASK_ROOT}/app.py
CMD [ "app.handler" ]