I’m getting an error showing like this when I test my API with AWS lambda. I created this api using python flask and severless

{
“errorMessage”: “Unable to import app.app”,
“errorType”: “Exception”,
“requestId”: “”,
“stackTrace”: [
File “/var/lang/lib/python3.12/importlib/init.py”, line 90, in import_modulen return _bootstrap._gcd_import(name[level:], package, level)n”,
File “”, line 1387, in _gcd_importn”,
File “”, line 1360, in _find_and_loadn”,
File “”, line 1331, in _find_and_load_unlockedn”,
File “”, line 935, in _load_unlockedn”,
File “”, line 995, in exec_modulen”,
File “”, line 488, in _call_with_frames_removedn”,
File “/var/task/wsgi_handler.py”, line 115, in n wsgi_app = import_app(config)n”,
File “/var/task/wsgi_handler.py”, line 48, in import_appn raise Exception(“Unable to import {}”.format(config[“app”]))n”
]
}

here Im providing my serverless.yml,DockerFile and wsgi_handler.py

serverless.yml

service: email-sender

provider:
  name: aws
  runtime: python3.12
  region: ap-south-1


functions:
  api:
    handler: wsgi_handler.handler
    events:
      - http:
          path: /
          method: post
      - http:
          path: /{proxy+}
          method: post

plugins:
  - serverless-wsgi
  - serverless-python-requirements
  - serverless-plugin-common-excludes
  - serverless-plugin-include-dependencies

custom:
  wsgi:
    app: app.app
  pythonRequirements:
    dockerizePip: true  # Use Docker to install dependencies
    layer: true         # Create a Lambda Layer for the requirements
    zip: true           # Zip the requirements to reduce the deployment package size
  commonExcludes:
    - '**/tests/**'

Dockerfile

FROM public.ecr.aws/lambda/python:3.9

`COPY app.py ./
COPY wsgi_handler.py ./
COPY requirements.txt ./

RUN pip install -r requirements.txt

ENV FLASK_APP=app.py

CMD [“wsgi_handler.handler”]
`

wsgi_handler.py

import os
from importlib import import_module

def import_app(config):
    module_name, app_name = config['app'].rsplit('.', 1)
    module = import_module(module_name)
    return getattr(module, app_name)

config = {
    'app': 'app.app'  # Adjust this path if necessary
}

wsgi_app = import_app(config)

def handler(event, context):
    return wsgi_app(event, context)

I need to fix the import error, I have tried with different method to import the app in app.py but failed.